Soft x-ray absorption magnetic circular dichroism study of ferromagnetic superconductor UGe2

被引：12

作者：

Okane, T ^{[1
]}

Okamoto, J

Mamiya, K

Fujimori, SI

Takeda, Y

Saitoh, Y

Muramatsu, Y

Fujimori, A

Haga, Y

Yamamoto, E

Tanaka, A

Honma, T

Inada, Y

Onuki, Y

机构：

[1] Japan Atom Energy Res Inst, Synchrotron Radiat Res Ctr, Mikazuki, Hyogo 6795148, Japan

[2] Univ Tokyo, Dept Complex Sci & Engn, Kashiwa, Chiba 2778561, Japan

[3] Univ Tokyo, Dept Phys, Kashiwa, Chiba 2778561, Japan

[4] Japan Atom Energy Res Inst, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

[5] Hiroshima Univ, ADSM, Higashihiroshima, Hiroshima 7398530, Japan

[6] Japan Synchrotron Radiat Res Inst, Mikazuki, Hyogo 6795198, Japan

[7] Okayama Univ, Fac Educ, Phys Lab 2, Okayama 7008530, Japan

[8] Osaka Univ, Dept Phys, Toyonaka, Osaka 5600043, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2006年 / 75卷 / 02期

关键词：

uranium compounds; ferromagnetism; superconductivity; x-ray absorption; magnetic circular dichroism;

D O I：

10.1143/JPSJ.75.024704

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

X-ray absorption magnetic circular dichroism (XMCD) at the U N-4.5 edges was measured for the ferromagnetic superconductor UGe2 in the normal state. The orbital and spin magneic moments deduced from the sum rule analysis of the XMCD data indicate that the U atom in UGe2 is considered to be closer to the trivalent state rather than the tetravalent state. The temperature dependence of the XMCD signal does not show any significant anomaly at T-* similar to 30K, where the resistivity anomaly was observed at ambient pressure. The XMCD measurement at the U N-2,N-3 edge indicates that the U 6d electrons have negligibly small magnetic contributions.

引用

页数：5

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