Enhancement of surface magnetization in antiferromagnetic nanoparticles

R.N. Bhowmik; R. Ranganathan

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Enhancement of surface magnetization in antiferromagnetic nanoparticles

机译：反铁磁性纳米粒子表面磁化强度的增强

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摘要

We report enhancement of magnetization below the antiferromagnetic ordering temperature T_N in nanoparticles of two antiferromagnets, viz CoRh_2O_4 and Cr_2O_3. The enhancement of magnetization below T_N is systematic, being larger for sample with smaller particle size. Scaling analysis showed that such enhancement of magnetization in CoRh_2O_4 nanoparticles is due to the superparamagnetic type contribution of surface (shell) spins. The present work shows that similar analysis can also be applied in Cr_2O_3 nanoparticles.

机译：我们报道了在两个反铁磁体（即CoRh_2O_4和Cr_2O_3）的纳米颗粒中，反铁磁有序温度T_N以下的磁化强度得到了增强。 T_N以下的磁化强度增强是系统性的，对于粒径较小的样品而言较大。缩放分析表明，CoRh_2O_4纳米粒子中这种磁化强度的增强是由于表面（壳）自旋的超顺磁性型贡献。目前的工作表明，类似的分析也可以应用于Cr_2O_3纳米粒子。

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来源
《Solid State Communications》 |2007年第7期|p.365-368|共4页
作者
R.N. Bhowmik; R. Ranganathan;
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作者单位

Department of Physics, Pondicherry University, R.V. Nagar, Kalapet, Pondicherry-605014, India;

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原文格式 PDF
正文语种 eng
中图分类固体物理学;
关键词
A. Antiferromagnetic nanoparticle; D. Enhancement of magnetization; D. Induced ferrimagnetic order; D. Superparamagnetism;

机译：A.反铁磁性纳米粒子;D.增强磁化强度;D．感应亚铁磁阶;D.超顺磁性;

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6. Enhanced Magnetic Properties in Antiferromagnetic-Core/Ferrimagnetic-Shell Nanoparticles [O] . Marianna Vasilakaki, Kalliopi N. Trohidou, Josep Nogués -1

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8. Magnetostatic Theory of Collective Excitations in Ferromagnetic and Antiferromagnetic Superlattices with Magnetization Perpendicular to the Surface [R] . Camley, R. E., Cottam, M. G. 1987

机译：垂直于表面磁化的铁磁和反铁磁超晶格中集体激发的静磁理论

Enhancement of surface magnetization in antiferromagnetic nanoparticles

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