Distribution of Spin Polarization in Ferrimagnetic DyFe2 by a Novel Analysis of Magnetic EXAFS

Tetsuya Nakamura; Masaichiro Mizumaki; Yasuhiro Watanabe; Susumu Nanao

doi:10.1143/JPSJ.67.3964

Distribution of Spin Polarization in Ferrimagnetic DyFe₂ by a Novel Analysis of Magnetic EXAFS

Tetsuya Nakamura, Masaichiro Mizumaki, Yasuhiro Watanabe, Susumu Nanao

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Magnetic EXAFS (MEXAFS) at the Fe K-edge in DyFe₂ powder and an Fe thin film were measured. In order to derive a ferrimagnetic coupling of spin moments between Dy and Fe from MEXAFS spectra, novel analysis for MEXAFS has been tried. The σ(r) profiles which are defined as the difference between the absolute values of Fourier transformed k³_χ+ (k) and k³_χ- (k) were calculated for the measured spectra. _χ+ (k) and _χ-(k) are EXAFS functions when the correlation between a X-ray beam and a magnetic field applied to a sample is parallel and anti-parallel, respectively. The σ(r) has well described the distribution of spin polarization with its sign for ferrimagnetic DyFe₂. A simulated distribution profile, in which only spin moments were considered, has been compared with the σ(r) in DyFe₂ and a good coincidence between them has been obtained. The σ(r) profile for an Fe thin film completely reflects the ferromagnetic character and this result supports the validity of the present analysis.

Original language	English
Pages (from-to)	3964-3968
Number of pages	5
Journal	journal of the physical society of japan
Volume	67
Issue number	11
DOIs	https://doi.org/10.1143/JPSJ.67.3964
Publication status	Published - 1998 Nov
Externally published	Yes

Keywords

Atomic X-ray absorption fine structure
DyFe
Extended X-ray absorption fine structure
Magnetic circular dichroism
Multi-electron excitation
Synchrotron radiation

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.67.3964

Cite this

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title = "Distribution of Spin Polarization in Ferrimagnetic DyFe2 by a Novel Analysis of Magnetic EXAFS",

abstract = "Magnetic EXAFS (MEXAFS) at the Fe K-edge in DyFe2 powder and an Fe thin film were measured. In order to derive a ferrimagnetic coupling of spin moments between Dy and Fe from MEXAFS spectra, novel analysis for MEXAFS has been tried. The σ(r) profiles which are defined as the difference between the absolute values of Fourier transformed k3χ+ (k) and k3χ- (k) were calculated for the measured spectra. χ+ (k) and χ-(k) are EXAFS functions when the correlation between a X-ray beam and a magnetic field applied to a sample is parallel and anti-parallel, respectively. The σ(r) has well described the distribution of spin polarization with its sign for ferrimagnetic DyFe2. A simulated distribution profile, in which only spin moments were considered, has been compared with the σ(r) in DyFe2 and a good coincidence between them has been obtained. The σ(r) profile for an Fe thin film completely reflects the ferromagnetic character and this result supports the validity of the present analysis.",

keywords = "Atomic X-ray absorption fine structure, DyFe, Extended X-ray absorption fine structure, Magnetic circular dichroism, Multi-electron excitation, Synchrotron radiation",

author = "Tetsuya Nakamura and Masaichiro Mizumaki and Yasuhiro Watanabe and Susumu Nanao",

year = "1998",

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doi = "10.1143/JPSJ.67.3964",

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TY - JOUR

T1 - Distribution of Spin Polarization in Ferrimagnetic DyFe2 by a Novel Analysis of Magnetic EXAFS

AU - Nakamura, Tetsuya

AU - Mizumaki, Masaichiro

AU - Watanabe, Yasuhiro

AU - Nanao, Susumu

PY - 1998/11

Y1 - 1998/11

N2 - Magnetic EXAFS (MEXAFS) at the Fe K-edge in DyFe2 powder and an Fe thin film were measured. In order to derive a ferrimagnetic coupling of spin moments between Dy and Fe from MEXAFS spectra, novel analysis for MEXAFS has been tried. The σ(r) profiles which are defined as the difference between the absolute values of Fourier transformed k3χ+ (k) and k3χ- (k) were calculated for the measured spectra. χ+ (k) and χ-(k) are EXAFS functions when the correlation between a X-ray beam and a magnetic field applied to a sample is parallel and anti-parallel, respectively. The σ(r) has well described the distribution of spin polarization with its sign for ferrimagnetic DyFe2. A simulated distribution profile, in which only spin moments were considered, has been compared with the σ(r) in DyFe2 and a good coincidence between them has been obtained. The σ(r) profile for an Fe thin film completely reflects the ferromagnetic character and this result supports the validity of the present analysis.

AB - Magnetic EXAFS (MEXAFS) at the Fe K-edge in DyFe2 powder and an Fe thin film were measured. In order to derive a ferrimagnetic coupling of spin moments between Dy and Fe from MEXAFS spectra, novel analysis for MEXAFS has been tried. The σ(r) profiles which are defined as the difference between the absolute values of Fourier transformed k3χ+ (k) and k3χ- (k) were calculated for the measured spectra. χ+ (k) and χ-(k) are EXAFS functions when the correlation between a X-ray beam and a magnetic field applied to a sample is parallel and anti-parallel, respectively. The σ(r) has well described the distribution of spin polarization with its sign for ferrimagnetic DyFe2. A simulated distribution profile, in which only spin moments were considered, has been compared with the σ(r) in DyFe2 and a good coincidence between them has been obtained. The σ(r) profile for an Fe thin film completely reflects the ferromagnetic character and this result supports the validity of the present analysis.

KW - Atomic X-ray absorption fine structure

KW - DyFe

KW - Extended X-ray absorption fine structure

KW - Magnetic circular dichroism

KW - Multi-electron excitation

KW - Synchrotron radiation

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