Specific-heat anomaly of metamagnetism on PrFe4P12 and UCoAl

被引：48

作者：

Matsuda, TD

Okada, H

Sugawara, H

Aoki, Y

Sato, H

Andreev, AV

Shiokawa, Y

Sechovsky, V

Honma, T

Yamamoto, E

Onuki, Y

机构：

[1] Tokyo Metropolitan Univ, Dept Phys, Hachioji, Tokyo 1920397, Japan

[2] Acad Sci Czech Republ, Inst Phys, CZ-18040 Prague 8, Czech Republic

[3] Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan

[4] Charles Univ, Inst Met Phys, CR-12116 Prague 2, Czech Republic

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

[6] Osaka Univ, Fac Sci, Osaka 5600043, Japan

来源：

PHYSICA B | 2000年 / 281卷

关键词：

specific heat; metamagnetism; filled skutterudite;

D O I：

10.1016/S0921-4526(99)01003-0

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The field dependence of specific hear has been measured at low temperatures in order to study two different types of f-electron metamagnetic systems. The antiferromagnet PrFe4P12 with Neel temperature of 6.4 K shows a sharp peak structure in CIT at the spin flip metamagnetic transition. In the high field state, the magnetic contribution C-m/T shows an anomalous huge value similar to 1.4 J/K-2 mol. UCoAl shows the metamagnetic transition from paramagnetic ground state at similar to 1 T. where C/T at 0.5 K shows an apparent decrease reflecting a change of the density of states. In the low-field state. ferromagnetic spin-fluctuation dominates in an anomalous temperature dependence of C. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：220 / 222

页数：3