LOCAL MAGNETIC-PROPERTIES OF IRON-RICH AMORPHOUS FE100-XZRX ALLOYS

被引：18

作者：

GHAFARI, M ^{[1
]}

CHMIELEK, N ^{[1
]}

KEUNE, W ^{[1
]}

FOLEY, CP ^{[1
]}

机构：

[1] CSIRO,DIV APPL PHYS,SYDNEY,NSW 2070,AUSTRALIA

来源：

PHYSICA B | 1989年 / 161卷 / 1-3期

关键词：

D O I：

10.1016/0921-4526(89)90138-5

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report results of 57Fe Mössbauer measurements on the magnetically concentrated re-entrant spin-glass amorphous Fe100-xZrx alloys (8{slanted equal to or less-than}x{slanted equal to or less-than}12) which give convincing evidence for a microscopic origin of the low-temperature magnetization anomaly at Tf<TC. This is shown by an anomalous increase in the magnetic hyperfine field and in the relative intensities of the (Δm=0)-Mössbauer lines below Tf upon cooling. No evidence was found for an antiferromagnetic phase. The shape of the hyperfine-field distribution at T=4.2 K in zero external field and in a field of 3 T is unchanged, indicating homogeneous behaviour of all Fe moments near saturation. Ferromagnetic order is not long-ranged, but determined by exchange-coupled magnetic clusters. The cluster moment near TC is found to decrease strongly with increasing Fe content and extrapolates to zero at x≈96. © 1989.

引用

页码：222 / 224

页数：3

共 12 条

[1]

BRAND RA, 1983, LECT NOTES PHYS, V192, P79

[2] COEXISTENCE OF SPIN-GLASS AND FERROMAGNETIC ORDERINGS [J].