Synthesis and exchange bias effect of CuFe2O4/NiO nanocomposites
Synthesis and exchange bias effect of CuFe2O4/NiO nanocomposites
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DOI：
10.1088/0964-1726/18/1/015018
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发表时间：
2008
影响因子：
4.1
通讯作者：
Z. Tian;S. Yuan;L. Liu;S. Yin;L. Jia;H. Duan;P. Li;C. Wang;J. Q. Li
中科院分区：
文献类型：
--
作者：
Z. Tian;S. Yuan;L. Liu;S. Yin;L. Jia;H. Duan;P. Li;C. Wang;J. Q. Li
采用一种新的化学液相法合成了亚铁磁CuFe 2 O 4纳米颗粒嵌入反铁磁NiO基体中的纳米复合材料。微观结构研究表明，复合材料中两相共存。磁性测量结果表明，样品在10 K时，当交换偏置场（HEB）约为110 Oe时，样品从300 K冷却到10 kOe时，磁滞回线呈现负交换偏置行为。此外，交换偏置场随温度的升高而减小，在T = 200 K时消失.这种交换偏置行为被解释为在FM/AFM界面处CuFe 2 O 4和NiO相之间的磁交换耦合。
Nanocomposites composed of ferrimagnetic (FM) CuFe2O4 nanoparticles embedded in an antiferromagnetic (AFM) NiO matrix have been synthesized by a new chemical liquid phase route. Microstructural studies indicate that two phases are coexistent in the composites. Magnetic measurements show that the hysteresis loop displays a negative exchange bias behavior with exchange bias field (HEB) about 110 Oe at 10 K, after the sample was cooled from 300 K with a magnetic field of 10 kOe. Furthermore, the exchange bias field decreases with increasing temperature and disappears at T≈200 K. This exchange bias behavior is interpreted in terms of the magnetic exchange coupling between CuFe2O4 and NiO phases at the FM/AFM interfaces.