Large loop shifts in hematite nanocrystals embedded in amorphous matrix

被引：4
|
作者：
Ma, J. [1 ]
Chen, K. [1 ]
机构：
[1] Qingdao Univ Sci & Technol, Coll Mat Sci & Engn, Lab Funct & Biomed Nanomat, Qingdao 266042, Peoples R China
来源：
MATERIALS RESEARCH EXPRESS | 2014年 / 1卷 / 01期
基金：
中国国家自然科学基金;
关键词：
loop shift; amorphous; spin glass; exchange bias; minor loop;
D O I：
10.1088/2053-1591/1/1/016102
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, magnetic hysteresis loop shifts were observed in amorphous-based hematite spin glass. The loop-shift values were found to be much higher than the values for any reported spin-glass system in equivalent test conditions. Also, these values were dependent on the temperatures and external-field ranges, which is indicative of the coexisted exchange bias effect (induced by the exchange coupling between ferromagnetic nanocrystals and spin glass matrix at low temperatures) and minor loops effect (derived from the unsaturated loop measurements).
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页数：7
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