Itinerant ferromagnetism in actinide -electron systems; Phenomenological analysis with spin fluctuation theory

Tateiwa, Naoyuki ; Pospil, J.*; Haga, Yoshinori ; Sakai, Hironori ; Matsuda, Tatsuma*; Yamamoto, Etsuji

We have carried out an analysis of magnetic data in 69 uranium, 7 neptunium and 4 plutonium ferromagnets with the spin fluctuation theory developed by Takahashi (Y. Takahashi, J. Phys. Soc. Jpn. , 3553 (1986)). The basic and spin fluctuation parameters of the actinide ferromagnets are determined and the applicability of the spin fluctuation theory to actinide system has been discussed. Itinerant ferromagnets of the transition metals and their intermetallics follow a generalized Rhodes-Wohlfarth relation ${p_{rm eff}}/{p_{rm s}}{,}{propto}{,}({T_{rm C}}/{T_0})^{-3/2}$ . Here, $p_{rm s}$ , $p_{rm eff}$ , $T_{rm C}$ , and are the spontaneous and effective magnetic moments, the Curie temperature and the width of spin fluctuation spectrum in energy space, respectively. The same relation is satisfied for ${T_{rm C}}/{T_0}< 1.0$ in the most of the actinide ferromagnets.

Language	:	English
Journal	:	Physical Review B
Volume	:	96
Number	:	3
Pages	:	p.035125_1 - 035125_15
Publication Year/Month	:	2017/07
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Paper URL	:	https://doi.org/10.1103/PhysRevB.96.035125
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Keywords	:	no keyword
Research Facility	:	第4研究棟
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Article of JAEA R&D Review	:
Cooperating Institute	:	首都大学東京; Charles University

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Registration No. : AA20170215
JAEA Abstracts No. : 47000604
Paper Submission No. : 21236

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