SUPERPARAMAGNETIC NANOPARTICLES AND CLUSTERS OF A FEW FE ATOMS IN AMORPHOUS FE0.33ZR0.67 ALLOYS

被引：7
作者：
RHIE, K
NAUGLE, DG
O, BH
MARKERT, JT
MORRISH, AH
ZHOU, XZ
机构：
[1] TEXAS A&M UNIV,DEPT PHYS,COLLEGE STN,TX 77843
[2] UNIV TEXAS,DEPT PHYS,AUSTIN,TX 78712
[3] UNIV MANITOBA,DEPT PHYS,WINNIPEG,MB R3T 2N2,CANADA
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 1995年 / 7卷 / 17期
关键词：
D O I：
10.1088/0953-8984/7/17/014
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A paramagnetic amorphous Fe0.33Zr0.76 alloy has been studied with Mossbauer spectroscopy and SQUID magnetometry. Low-field magnetization measurements revealed the existence of superparamagnetic nanoparticles of thousands of mu(B) embedded in the alloy with a blocking temperature of 50 K. A saturation of local moments (15.9 mu(B)), possibly clusters of a few Fe ions, is observed at 4.6 K around 10 kOe. The temperature dependence of the high-field magnetic susceptibility of Fe0.33Zr0.67 is interpreted with Curie's law for these Fe clusters and nanoparticles.
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页码：3315 / 3326
页数：12
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