Dependence of exchange bias on the field-cooled remanent magnetic state in Ni/NiO nanogranular samples

L. Del Bianco; F. Spizzo; M. TamisariS. Laureti

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Dependence of exchange bias on the field-cooled remanent magnetic state in Ni/NiO nanogranular samples

机译：Dependence of exchange bias on the field-cooled remanent magnetic state in Ni/NiO nanogranular samples

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摘要

The magnitude of the exchange bias (EB) effect in nanogranular Ni/NiO samples (with Ni content between about 4 and 69 wt and mean size of the Ni crystallites of the order of 10 nm) has been found to be strictly related to the increase in the remanent magnetization measured after field-cooling, with respect to the value after zero-field-cooling, normalized to the saturation magnetization. This allows describing the EB mechanism in terms of the fraction of the magnetic moments of the Ni nanocrystallites that irreversibly has aligned in the field direction during field-cooling, due to the exchange anisotropy, and that is effectively involved in the loop shift. Hence, the possibility of tuning EB by controlling the fieldcooled remanent magnetic state is shown.

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来源
《Solid State Communications》 |2011年第5期|351-353|共4页
作者
L. Del Bianco; F. Spizzo; M. TamisariS. Laureti;
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作者单位

Dipartimento di Fisica, Università di Bologna and CNISM, I-40127 Bologna, Italy;

Dipartimento di Fisica, Università di Ferrara and CNISM, I-44100 Ferrara, Italy;

ISM-CNR, Area della Ricerca Roma1, 00015 Monterotondo Scalo (RM), Italy;

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正文语种英语
中图分类固体物理学;
关键词
A. Nanogranular samples; D. Exchange bias; D. Remanent magnetization;

Dependence of exchange bias on the field-cooled remanent magnetic state in Ni/NiO nanogranular samples

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