First-order valence transition of EuPd2Si2 induced by high magnetic fields

被引：23

作者：

Wada, H ^{[1
]}

Mitsuda, A ^{[1
]}

Shiga, M ^{[1
]}

Katori, HA ^{[1
]}

Goto, T ^{[1
]}

机构：

[1] UNIV TOKYO, INST SOLID STATE PHYS, MINATO KU, TOKYO 106, JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1996年 / 65卷 / 11期

关键词：

intermediate valence; EuPd2Si2; high field; metamagnetism;

D O I：

10.1143/JPSJ.65.3471

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In order to study the magnetic field effects on the intermediate valence of the Eu system, magnetization was measured for EuPd2Si2 and Eu(Pd0.95Pt0.05)(2)Si-2 up to 100 T. A first-order metamagnetic transition was observed for both samples under high magnetic fields. The transition field is 93T for EuPd2Si2 at 6 K. The saturation magnetization close to 7(mu B) indicates that this metamagnetism is a field-induced valence transition from an intermediate valence state to a divalent state of the Eu ion. Based on the interconfigurational fluctuation (ICF) model, the excitation energy to convert an Eu3+ into Eu2+ was estimated. Temperature dependence of the metamagnetic transition field of EuPd2Si2 was also studied.

引用

页码：3471 / 3473

页数：3

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