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ratio (branching ratio) from its statistical value. To address this point we established a double-pole approximation within time-dependent density functional theory. 2) The analysis of the L2;3 XMCD of rare earth elements is not only hampered by the appearance of electric quadrupolar contributions (E2) in addition to the dipolar contributions (E1).

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ratio (branching ratio) from its statistical value. To address this point we established a double-pole approximation within time-dependent density functional theory. 2) The analysis of the L2,3 XMCD of rare earth elements is not only hampered by the appearance of electric quadrupolar contributions (E2) in addition to the dipolar contributions (E1).

著者: H Wende · A Scherz · A Scherz · C Sorg · K Baberschke · E K U Gross提携:Free University of Berlin · Stanford University · Rutgers University · University of Wash詳細情報: Time-dependent density functional theory · Stochastic matrix · Magnetic susceptibility
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ratio of L2/L3 which deviates from the statistical weight ( branching ratio ) 1/2. In addition to these effects, we consider the degenerate or nearly degenerate effects of core levels from which photoelectrons are excited. In XPS spectra, for example in Rh 3d sub level

Cited by: 2
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ratio (branching ratio) from its statistical value. To address this point we established a double-pole approximation within time-dependent density functional theory. 2) The analysis of the £2,3 XMCD of rare earth elements is not only hampered by the appearance of electric quadrupolar contributions (E2) in addition to the dipolar contributions (El).

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We present LDA+U calculations and analysis of the XMCD L3/L2 branching ratio (BR) for ferromagnetic heavy hcp rare earth metals. With no spin orbit coupling in the conduction bands and with the same radial function for the 2p3/2 and 2p1/2 core states the ratio is exactly 1:-1.

著者: Yongbin Lee · Jongwoo Kim · A I Goldman · B N Harmon詳細情報: X-ray magnetic circular dichroism · Exchange interaction · Materials science · Spin–
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branching ratio L3: L2 = 2 : 1 L 2 XMCD ( I ↓ left – I ↓ right) ∝(1/3 – 1/9) R 2 = 2/9 R 2 L 3 XMCD ( I ↓ left – I ↓ right) ∝(1/3 – 5/9) R 2 = -2/9 R 2

発表年:Characterization of Materials · 2002著者: J C Lang提携:Argonne National Laboratory詳細情報: X-ray absorption spectroscopy · Synchrotron radiation · Sample preparation · Magneti
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Branching ratios of the circular dichroism at rare earth L23 edges. Abstract. This paper studies the magnetic circular dichroism (XMCD) at the 2p→5d absorption edges of rare earths. We show that the radial extent of the 5d orbital is affected not only by the spin but also by the orbital part of the df-Coulomb interaction.

Cited by: 7
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X-ray Magnetic Dichroism : dependence of the x-ray absorption of a magnetic material on the polarisation of x-rays 1846 – M. Faraday: polarisation of visible light changes when trasmitted by a magnetic material. 1975 – Erskine and Stern – first theoretical formulation of XMCD effect. excitation from a core state to a valence state for the M.

発表年:Characterization of Materials · 2002著者: J C Lang提携:Argonne National Laboratory詳細情報: X-ray absorption spectroscopy · Synchrotron radiation · Sample preparation · Magneti
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X-ray Dichroism in Absorption : history 1846 – M. Faraday: polarisation of visible light changes when transmitted by a magnetic material 1975 – Erskine and Stern – first theoretical formulation of XMCD effect excitation from a core state to a valence state for the M2,3 edge of Ni. 1985 – Thole, van de Laan, Sawatzky – first calculations of XMLD for rare earth

Journal of Electron Spectroscopy and Related Phenomena 86 (1997) 151–158 Branching ratios of the circular dichroism at rare earth L 23 edges Michel van Veenendaal*, J.B. Goedkoop, B.T. Thole European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble Ce´dex, France Abstract This paper studies the magnetic circular dichroism (XMCD) at the 2p → 5d absorption edges of rare earths.

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XMCD in a GdFe alloy at the Gd L3-edge were unsuc-cessful [19]. A year later, Thole et al. [20] predicted strong XMCD and X-ray magnetic linear dichroism (XMLD) in the M4,5 (3d → 4f)-edges of rare-earths, and the latter was reported in 1986 [21]. The XMCD effect was finally ob-served at the K-edge of metallic Fe by Schütz et al.[22] in 1987 (Fig. 2).

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the branching ratio at T = 5 K and 300 K measured in independent experiments. The inset shows the pressure dependence of the XMCD signal for two independent experimental runs (run 1 from Ref. [17]). Note that the collapse of net magnetization coincides with the drop in BR. (d), (e) Temperature- and field-dependent XMCD signal at selected

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Deciphering the information contained in XMCD and XRMS amplitudes, and relating these amplitudes to the details of the electronic and magnetic structure of the material, are important, but di–cult tasks. Over the past few years, one of the most intriguing issues has been the so-called branching ratio

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1 XMCD under pressure at the Fe K edge on the energy dispersive beamline of the ESRF O. Mathon a, F. Baudelet b, c, J.-P. Itié b, S. Pasternak a, A. Polian b and S. Pascarelli a aEuropean Synchrotron Radiation Facility, BP 220, 38043 Grenoble cedex, France b Physique des Milieux Condensés, CNRS-UMR 7602 Université Paris VI, B 77, 75252 Paris CEDEX 05, France ,

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X-ray magnetic circular dichroism (XMCD) spectroscopy is a powerful emerging technique that measures difference in absorption of left- and right-circularly polarized X-rays by a magnetized sample, often at cryogenic temperatures.

Cited by: 131
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•The total decay width is equal to the sum of the decay widths for all the allowed decays. •The branching ratio, BR, is the fraction of time a particle decays to a particular final state: This is an example. Learn the concepts, not the details about this particular decay.

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Jul 18, 2018 · XANES and XMCD spectra were recorded at different applied magnetic fields below and above the metamagnetic transition . Figure 19 shows typical isotropic absorption and XMCD spectra recorded at 17 T and 2.1 K at the ID12 beamline. From the branching ratio for the transition of U, the valence spin–orbit interaction per hole, is deduced

Cited by: 3
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Computational templates for introductory nuclear science using MathCad D. G. Sarantites and L. G. Sobotka Departments of Chemistry and Physics, Washington University, St. Louis, MO, 63130, USA (Dated: July 20, 2011) Computational templates used to teach an introductory course in nuclear chemistry and physics

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so-called ‘‘anomalous’’ branching ratio [10 ,11], i.e., a strong deviation from the statistical 2:1 ratio [12]ofL3 to L2 x-ray absorption lines, which has been a matter of intense discussion over the last 20 years [1–5]. Several approaches have been made to explain the evolution of the anomalous branching ratio along the 3d series by the

発表年:Physical Review Letters · 2008著者: J T Lau · J Rittmann · V Zamudiobayer · M Vogel · K Hirsch · Ph Klar提携:Technical University of Berlin詳細情報: Cobalt · Electron · Titanium · Electronic structure · Transition metal · Vanadium
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The XMCD experiments performed at theM4,5 absorption edges of Np and Pu allow us to determine the spectroscopic branching ratio, which gives information on the coupling scheme in these materials.

In particle physics and nuclear physics, the branching fraction (or branching ratio) for a decay is the fraction of particles which decay by an individual decay mode with respect to the total number of particles which decay. It is equal to the ratio of the partial decay constant to the overall decay constant. Sometimes a partial half-life is given, but this term is misleading; due to competing

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From the branching ratio B, it is found that the occupation number of 5f electrons (n5f) in UGe 2 is close to 3. In addition, applying the magneto-optical sum rules analysis to the XMCD spectrum at the U N4,5 edges, the ratio of orbital magnetic moment to the spin magnetic moment (-ML/MS) is

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Thus, we analyze the models based on this interaction, proposed to account for the unexpected sign of E1-XMCD measurements, as well as the nonstatistical branching ratio between XMCD at the L II and L III edges. We underline the impossibilities of reproducing our measurements using these models.

発表年:Physical Review B · 2004著者: C Giorgetti · E Dartyge · F Baudelet · R M Galera提携:University of Paris Sud · Centre National De La Recherche Scientifique詳細情報: Hydrate · X-ray magnetic circular dichroism · Magnetic circular dichroism · Intermet
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result in a deconvolution of the XMCD spectra into different excitation channels, interpreted by variations of the unoccu-pied density of states. Effectively, it is assumed that the de-viation of the branching ratio from its statistical value of 2/3 gives rise to a correction factor. In the discussion we analyze

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Thus, we analyze the models based on this interaction, proposed to account for the unexpected sign of E1-XMCD measurements, as well as the nonstatistical branching ratio between XMCD at the LII

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The expected ratio of resonant magnetic scattering intensities at Ir L 2;3 edges in a diffraction experiment is therefore I L 2 =I L 3 /jf measurement of the branching ratio, BR ¼ I L 3 =I L 2, where I L 2;3 XMCD data collected at T ¼ 6K, H ¼ 0:8T, and ambient pressure. (Top right) CI calculations of XANES and XMCD

CiteSeerX – Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract. We show that the standard analysis procedures as sum rule application and multipole-moment analysis for XMCD spectra can fail for magnetic samples of present interest. Two examples will be given: 1) The induced magnetic moments in ultrathin films of the light 3d elements Ti, V and Cr at the interface to Fe

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XAS and XMCD study of Mn and Co nanoclusters on Si (111)-(7×7) It is well known that the L3-L2 branching atio (R0=I(L3)/I(L2)) and multiplet structures nd Cr as pointed out by F. de Groot et al [4]. nd the variation of the ratio could be istinguishable even for

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The analysis of the branching ratio and XMCD at the U-M 4;5 edges reveals that the U-5f electrons count is close to 3. The orbital (˘0:70 B) and spin (˘ 0:30 B) moments of U at 2.1K and 17T (H//c) have been determined. Their ratio (˘ 2:3) suggests a signi cant delocalization of

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XAS and XMCD study of Mn and Co nanoclusters on Si (111)-(7×7) It is well known that the L3-L2 branching atio (R0=I(L3)/I(L2)) and multiplet structures nd Cr as pointed out by F. de Groot et al [4]. nd the variation of the ratio could be istinguishable even for

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close to 13 eV for Fe and 7 eV for V. The branching ratio of the experimental Fe XAS spectra is 2:1 as for free Fe atoms, while for V the branching ratio is found close to 1:1. This is the usual case for XAS spectra of early 3 d metals, where a strong electron-core interaction leads to

In particle physics and nuclear physics, the branching fraction (or branching ratio) for a decay is the fraction of particles which decay by an individual decay mode with respect to the total number of particles which decay. It is equal to the ratio of the partial decay constant to the overall decay constant.

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We show that the standard analysis procedures as sum rule application and multipole‐moment analysis for XMCD spectra can fail for magnetic samples of present interest. Two examples will be given: 1) The induced magnetic moments in ultrathin films of the light 3d elements Ti, V and Cr at the interface to Fe cannot be determined by the XMCD sum rule or multipole‐moment analysis at the L2,3

Accuracy of the spin sum rule in XMCD for the transition-metal L edges from manganese to copper. 12 Pages. Accuracy of the spin sum rule in XMCD for the transition-metal L edges from manganese to copper. Physical Review B, 2009. Piter S Miedema. Frank de Groot. Cinthia Piamonteze.

Abstract. We show that X-ray magnetic circular dichroism (XMCD) can be employed to probe the oxidation states and other electronic structural features of nickel active sites in pr

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Figure 3.9 The XRMS branching ratio for the heavy rare-earth elements in i?Ni2Ge2 compounds. The solid squares represent the ratio of intensities from the L2 and L3 edges shown in Fig. 3.8. The solid circles show the result of the first principles calculations,

著者: Jongwoo Kim詳細情報: Condensed matter physics

The XMCD experiments performed at the M-4,M-5 absorption edges of Np and Pu allow us to determine the spectroscopic branching ratio, which gives information on the coupling scheme in these materials. In all materials, the intermediate coupling scheme is found appropriate.

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X-ray Detected Magnetic Resonance (XDMR) is a novel spectroscopy in which X-ray Magnetic Circular Dichroism (XMCD) is used to probe the resonant precession of local magnetization components in a strong microwave pump field. We review the conceptual bases of XDMR and recast them in the general framework of the linear and nonlinear theories of ferromagnetic resonance (FMR).

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h and the ratio of orbital-to-spin magnetic moment as in Ni [S6], the orbital magnetic moment estimated from the branching ratio of the XANES is between m l ˇ0:33 (B= 0:8) and m l ˇ0:56 (B= 0:85). This huge absolute value of the orbital magnetic moment is approximately the same for octahedral and tetrahedral lattice sites, but compensates each other.

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the L3/L2 branching ratio is about 2 which can be simply explained by the statistical ratio of the core electrons. However in XMCD (XRMS) experiments with rare earth compounds, very various numbers of BR have been observed. To understand these phenomena, models

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1 SPring-8「放射光による磁気材料評価技術」 (12/16/2004,大阪千里) 硬硬XX線線MCDMCDによるナノ磁性体の分析によるナノ磁性体の分析 アウトライン (1) 硬X線磁気円二色性(XMCD)の特長

The ratio of the number of parent atoms or particles decaying by one mode to the number decaying by another mode; the ratio of two specified branching fractions Explanation of branching ratio Branching ratio | Article about branching ratio by The Free Dictionary

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3. Experimental XMCD set-up The beamline BM25 (SpLine) (Castro, 1998) at the ESRFis a bending-magnet beamline split into two different branches each with a horizontal opening angle of 2 mrad, one (branch A) centered at 3.5 mrad and with a critical energy of 9.6 keV, and the other (branch B) centered at 10.5 mrad with a critical energy of 20.6 keV.

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Np 5f states is determined from the branching ratio of the x-ray-absorption spectra at the Np M 4,5 edges. The experimental value is very close to the result obtained theoretically in the intermediate-coupling (IC) approximation. The ratio between the magnetic-dipole term T z and the spin component S z deduced from the dichroic-signal-branching ratio also agrees

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(XMCD) is now widely used to investigate the local magnetic properties of molecules or of solids both in the bulk or at the surface. This technique combines the compound also present a different branching ratio between the isotropic intensities of the M 4 and M 5 absorption edges.

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B-factory branching fraction measurements of major τ-decay modes. For example, the average ratio of systematic to statisti-cal uncertainty of the B-factory measurements of τ branching fractions larger than 10−3 is 17.6, while the average ratio for branching fractions smaller than 10−4 is 0.9. Thus, the total

The propagating materials (root cuttings) are straight pieces of healthy roots, 25-30 cm in length and 5-10 mm in diameter, free from branching, cut at both ends,

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3 lines (the branching ratio) is a good indication for the spin state of Fe. For FeSb 2, we find a clearly enhanced spectral weight at the L 2 line, like for the low-spin FeS 2 reference. The branching ratio thus indicates a predominant low-spin state for FeSb 2. Interestingly, we also see features in the FeSb 2 spectrum which are not present

Apr 13, 2011 · Due to the competition among the effects of crystal field, mixed valency, and external magnetic field, the magnetic-field-dependence of XMCD spectra exhibits a variety of features; for instance, the branching ratio, R(L 2 /L 3), of L 2 and L 3 XMCD intensities of Ce compounds can take R(L 2 /L 3) > 1.0 and <1.0, and that of Yb compounds can

The analysis of the branching ratio of the U M{sub 4,5} edges confirms the fact that the occupation number of the 5f states in UFe{sub 2} is lower than in other compounds where the f

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Temperature dependence of the interface moments in Co X-ray magnetic circular dichroism XMCD is utilized to explore the temperature dependence of the interface moments in Co 2MnSi CMS thin films capped with aluminum. By increasing the the branching ratio is larger

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d2.79 (trivalent) with ~1:3 for the total XAS, while this ratio is ~1:3 at 3 K and goes all the way up to ~1:1.5 at 80 K for the XMCD spectra. This suggests that, compared to the Cr d3.70, the Cr d2.79 loses mag-netic ordering significantly faster with increasing temperature. The branching ratio (31), which quantifies the relative intensity of

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We show that X-ray magnetic circular dichroism (XMCD) can be employed to probe the oxidation states and other electronic structural features of nickel active sites in proteins. As a calibration standard, we have measured XMCD and X-ray absorption (XAS) spectra for the nickel(II) derivative of Pseudomonas aeruginosa azurin (NiAz). Our analysis of these spectra confirms that the electronic

The high intensity of the calculated L2 edge makes the theoretical XMCD integrated L3/L2 branching ratio of 1.32 much smaller than the experimental ratio of 1.72. This is because the LSDA fails to represent the physics of the core hole photo-excited electron recombination.

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Jul 20, 2016 · The branching ratios extracted from XAS (0.85; Table 1) are identical for 1 and 2, and very close to the values found for oxido-iridates, for example,

The calculated XMCD intensity is relatively less in the[100] magnetization axis when compared to the [001] axis of magnetization. For both the axes, the low intensity of the calculated L2 edge makes the theoretical XMCD integrated L3 /L2 branching ratio to be much larger than the experimental one.

With the ab initio multiplet method, transition metal (M) L2,3-edge X-ray absorption near-edge structures (XANES) and electron energy loss near-edge structures (ELNES) can be predicted in detail. In this study, theoretical fingerprints, their orientation dependences, and theoretical branching ratios of M L3- and L2-edges for LiMO2 and Li-extracted MO2 (M = Mn, Fe, Co, Ni) are obtained.

Let \tau be the lifetime of a decay reaction, then the decay constant is defined by \Gamma=1/\tau. The branching ratio for species i is then defined as \Gamma_i/\sum_i \Gamma_i. See

Core-hole correlation effects were not included accounting for the deviation of the experimental branching ratio (close to 1:1) of the V-XAS (see top panels). Looking at the XMCD spectra (bottom panels), we find that nearly the full absorption fine structure is reproduced by theory.