EU-151-MOSSBAUER STUDY OF PRESSURE-INDUCED VALENCE TRANSITIONS IN EUM(2)GE(2) (M=NI,PD,PT)

被引：33

作者：

HESSE, HJ

WORTMANN, G

机构：

[1] Fachbereich Physik, Universität GH Paderborn, Paderborn

来源：

HYPERFINE INTERACTIONS | 1994年 / 93卷 / 1-4期

关键词：

D O I：

10.1007/BF02072899

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Eu-151-Mossbauer spectroscopy is used to study the ternary intermetallics EuM(2)Ge(2) (M = Ni, Pd, Pt), in which Eu is divalent, and EuNi2Si2 as a trivalent reference system in the pressure range 0-31 GPa. In EuNi2Ge2 and EuPd2Ge2, one observes a valence transition from Eu2+ to EU(3+) around 5 and 25 GPa, accompanied by a change in isomer shift of 9.3 and 10.1 mm/s, respectively. These are the largest pressure-driven changes in isomer shift for Eu-151-spectroscopy observed up to now.

引用

页码：1499 / 1504

页数：6

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