相分离体系Nd1-xSrxCoO3的亚铁磁行为

大学物理 ›› 2012, Vol. 31 ›› Issue (1): 9-9.

相分离体系Nd1-xSrxCoO3的亚铁磁行为

杨亦云[1,2] 隋郁[2]

[1]安康学院电子与信息工程系,陕西安康725000 [2]哈尔滨工业大学应用物理系凝聚态科学与技术研究中心,黑龙江哈尔滨150001

出版日期:2012-01-25 发布日期:2012-01-20

Ferrimagnetic behavior of phase-separated polycrystalline perovskite Nd1-xSrxCoO3

Online:2012-01-25 Published:2012-01-20

摘要/Abstract

摘要： 研究了Nd1-xSrCoO3（0．1≤x≤0．5）系列多晶样品在低温时的亚铁磁行为．通过传统的固相反应法合成了Nd1-xSrCoO3多晶样品，应用物理性质测试系统对样品进行了直流磁化强度、磁滞回线的测试．磁化强度的研究表明，随掺杂量增加，团簇的数目和尺寸都在增加，铁磁性增强．同时，多晶样品在低温时形成亚铁磁序．磁滞回线的研究表明，Nd离子与Co离子之间存在磁性耦合．由于co与Nd的反平行排列，Nd1-xSrCoO3体系低温时出现亚铁磁序．

关键词: 亚铁磁行为, 磁性耦合, 相分离, 自旋玻璃

Abstract: The ferrimagnetic behavior of polycrystalline Nd1-xSrxCoO3 （0.1≤x≤0.5 ） sample is systematically investigated. The sample is prepared by using conventional solid state reaction method. The DC magnetization and the hysteresis loops of polycrystalline Nd1-xSrxCoO3 are carried out by using the physical properties measurement system of quantum design. DC magnetization studies show that magnetization increases in magnitude as a result of increasing size and number of ferromagnetic clusters, which shows ferromagnetic ordering. Moreover, DC magneti- zation studies show that polycrystalline samples form the formation of ferrimagnetic order at low temperature. The re- sult of the hysteresis loop suggests that magnetic coupling exists between Nd ions and Co ions. Therefore, Nd1-xSrxCoO3 ferrimagnetic order appears at low temperature due to the Co and Nd anti-parallel.

Key words: ferrimagnetic behavior, magnetic coupling, the phase separation, spin glass

中图分类号:

O482.54

杨亦云[;] 隋郁[]. 相分离体系Nd1-xSrxCoO3的亚铁磁行为[J]. 大学物理, 2012, 31(1): 9-9.