Negative magnetization and the sign reversal of exchange bias field in Co(Cr1-xMnx)2O4 (0 ≤ x ≤ 0.6)

被引：22

作者：

Li, Canglong ^{[1
]}

Yan, Tengyun ^{[1
]}

Chakrabarti, Chiranjib ^{[1
]}

Zhang, Run ^{[1
]}

Chen, Xinghan ^{[1
]}

Fu, Qingshan ^{[1
]}

Yuan, Songliu ^{[1
]}

Barasa, Godfrey Okumu ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Hubei, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2018年 / 123卷 / 09期

基金：

中国国家自然科学基金;

关键词：

SPIN REORIENTATION;

D O I：

10.1063/1.5009404

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A series of Co(Cr1-xMnx)(2)O-4 (0 <= x <= 0.6) ceramic samples have been synthesized by using the sol-gel method. The magnetic properties of the ceramics are experimentally studied through different protocols of dc magnetization measurements. It is found that Mn-doping continuously decreases the total magnetization for x in the range of 0 <= x <= 0.2 and the net magnetization becomes negative in the range of 0.3 <= x <= 0.5. The net magnetization reverses and becomes positive upon further increasing x to 0.6. This unusual magnetic phenomenon in the system for x = 0.3-0.5 can be called as negative magnetization. It is regarded as arising from the competition of the two magnetic sub-lattices at different crystallographic sites. For the sample x = 0.3, the magnetic switching effect near the compensation temperature T-comp has been studied, and it shows potential applications in the spintronic devices. The magnetic configuration of the sample could be changed under a high magnetic field, and the spin is reoriented at T-SR. Both positive and negative exchange bias effects are observed, which are ascribed to the pinning force of uncompensated spins on ferromagnetic moments and the magneto-structural transition, respectively. Published by AIP Publishing.

引用

页数：7

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