Polarization of U 5f states in uranium multilayers

R. Springell; F. Wilhelm; A. Rogalev; W. G. Stirling; R. C. C. Ward; M. R. Wells; S. Langridge; S. W. Zochowski; G. H. Lander

doi:10.1103/PhysRevB.77.064423

Polarization of U 5f states in uranium multilayers

R. Springell^*, F. Wilhelm, A. Rogalev, W. G. Stirling, R. C. C. Ward, M. R. Wells, S. Langridge, S. W. Zochowski, G. H. Lander

^*Corresponding author for this work

Interface Analysis Centre

Research output: Contribution to journal › Article (Academic Journal) › peer-review

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Abstract

X-ray magnetic circular dichroism (XMCD) measurements were performed at the U M(4,5) edges for U/Fe, U/Co, U/Ni, and U/Gd multilayers. In the case of the U/Fe system, a significant polarization of the U 5f electrons was found, but not for U/Co or U/Ni multilayers. We ascribe this to a hybridization of U 5f and Fe 3d states, which overlap in energy near the Fermi level. In the U/Gd system, the XMCD signals were small and yielded magnetic moments of order 0.02 mu(B). The spatial extent of the U 5f polarization is different from that of the U/Fe system and is oscillatory, extending into the center of the U layers.

Original language	English
Article number	064423
Number of pages	6
Journal	Physical Review B: Condensed Matter and Materials Physics
Volume	77
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.77.064423
Publication status	Published - Feb 2008

Keywords

MAGNETIC CIRCULAR-DICHROISM
ELECTRONIC-STRUCTURE
SELF-ABSORPTION
SUPERLATTICES
REFLECTIVITY
US

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@article{ff2998a7923246acb3f2bd680b7f9a24,

title = "Polarization of U 5f states in uranium multilayers",

abstract = "X-ray magnetic circular dichroism (XMCD) measurements were performed at the U M(4,5) edges for U/Fe, U/Co, U/Ni, and U/Gd multilayers. In the case of the U/Fe system, a significant polarization of the U 5f electrons was found, but not for U/Co or U/Ni multilayers. We ascribe this to a hybridization of U 5f and Fe 3d states, which overlap in energy near the Fermi level. In the U/Gd system, the XMCD signals were small and yielded magnetic moments of order 0.02 mu(B). The spatial extent of the U 5f polarization is different from that of the U/Fe system and is oscillatory, extending into the center of the U layers.",

keywords = "MAGNETIC CIRCULAR-DICHROISM, ELECTRONIC-STRUCTURE, SELF-ABSORPTION, SUPERLATTICES, REFLECTIVITY, US",

author = "R. Springell and F. Wilhelm and A. Rogalev and Stirling, \{W. G.\} and Ward, \{R. C. C.\} and Wells, \{M. R.\} and S. Langridge and Zochowski, \{S. W.\} and Lander, \{G. H.\}",

year = "2008",

month = feb,

doi = "10.1103/PhysRevB.77.064423",

language = "English",

volume = "77",

journal = "Physical Review B: Condensed Matter and Materials Physics",

issn = "1098-0121",

publisher = "American Physical Society (APS)",

number = "6",

}

TY - JOUR

T1 - Polarization of U 5f states in uranium multilayers

AU - Springell, R.

AU - Wilhelm, F.

AU - Rogalev, A.

AU - Stirling, W. G.

AU - Ward, R. C. C.

AU - Wells, M. R.

AU - Langridge, S.

AU - Zochowski, S. W.

AU - Lander, G. H.

PY - 2008/2

Y1 - 2008/2

N2 - X-ray magnetic circular dichroism (XMCD) measurements were performed at the U M(4,5) edges for U/Fe, U/Co, U/Ni, and U/Gd multilayers. In the case of the U/Fe system, a significant polarization of the U 5f electrons was found, but not for U/Co or U/Ni multilayers. We ascribe this to a hybridization of U 5f and Fe 3d states, which overlap in energy near the Fermi level. In the U/Gd system, the XMCD signals were small and yielded magnetic moments of order 0.02 mu(B). The spatial extent of the U 5f polarization is different from that of the U/Fe system and is oscillatory, extending into the center of the U layers.

AB - X-ray magnetic circular dichroism (XMCD) measurements were performed at the U M(4,5) edges for U/Fe, U/Co, U/Ni, and U/Gd multilayers. In the case of the U/Fe system, a significant polarization of the U 5f electrons was found, but not for U/Co or U/Ni multilayers. We ascribe this to a hybridization of U 5f and Fe 3d states, which overlap in energy near the Fermi level. In the U/Gd system, the XMCD signals were small and yielded magnetic moments of order 0.02 mu(B). The spatial extent of the U 5f polarization is different from that of the U/Fe system and is oscillatory, extending into the center of the U layers.

KW - MAGNETIC CIRCULAR-DICHROISM

KW - ELECTRONIC-STRUCTURE

KW - SELF-ABSORPTION

KW - SUPERLATTICES

KW - REFLECTIVITY

KW - US

U2 - 10.1103/PhysRevB.77.064423

DO - 10.1103/PhysRevB.77.064423

M3 - Article (Academic Journal)

SN - 1098-0121

VL - 77

JO - Physical Review B: Condensed Matter and Materials Physics

JF - Physical Review B: Condensed Matter and Materials Physics

IS - 6

M1 - 064423

ER -

Polarization of U 5f states in uranium multilayers

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