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首页> 外文期刊>Journal of magnetism and magnetic materials >Study of exchange bias and training effect in NiCr_2O_4
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Study of exchange bias and training effect in NiCr_2O_4

机译：NiCr_2O_4中交换偏向和训练效果的研究

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摘要

Single phase sample of NiCr_2O_4 crystallized in a tetragonal structure of I4_1/amd space group was prepared. Ferrimagnetic transition at T_C=73 K along with a large irreversibility has been observed from the magnetization measurement. The sample exhibits exchange bias phenomenon and it is explained by considering the anisotropic exchange interaction between the ferrimagnetic and the antiferromagnetic components of magnetic moment. Presence of training effect is also observed. The exchange bias field (H_(EB)) is found to decay exponentially with increase in temperature and however, the coercive field [H_C~(eff)] follows the empirical relation H_C~(eff) = H_C~(eff)(0)[1 -(T/(T'_C))~2]. The maximum experimental values of H_(EB) and H_C~(eff) are found to be 313 Oe and 4839 Oe respectively.
机译：制备了以I4_1 / amd空间群的四方结构结晶的NiCr_2O_4单相样品。从磁化测量中观察到在T_C = 73 K处的亚铁磁跃迁以及大的不可逆性。样品表现出交换偏置现象，并通过考虑磁矩的亚铁磁性成分和反铁磁性成分之间的各向异性交换相互作用来解释。还观察到训练效果的存在。发现交换偏置场（H_（EB））随着温度的升高呈指数衰减，但是，矫顽场[H_C〜（eff）]遵循经验关系H_C〜（eff）= H_C〜（eff）（0） [1-（T /（T'_C））〜2]。发现H_（EB）和H_C〜（eff）的最大实验值分别为313 Oe和4839 Oe。

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