中国物理B ›› 2008, Vol. 17 ›› Issue (7): 2721-2724.doi: 10.1088/1674-1056/17/7/061

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Electron spin resonance study of the Ba-doping manganite Nd0.5Sr0.5MnO3

邢茹1, 鲁毅1, 浩斯巴雅尔1, 赵明宇1, 金香1, 郑琳1, 赵建军2, 孙阳3, 宁伟4, 成昭华4   

  1. (1)Department of Physics, Baotou Normal University, Inner Mongolia Autonomous Regions, Baotou 014030, China; (2)Department of Physics, Baotou Normal University, Inner Mongolia Autonomous Regions, Baotou 014030, China;State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,; (3)State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (4)State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2008-01-18 修回日期:2008-03-04 出版日期:2008-07-09 发布日期:2008-07-09
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 50672126) and the Inner Mongolia Natural Science Foundation of China (Grant No 200607010102).

Electron spin resonance study of the Ba-doping manganite Nd0.5Sr0.5MnO3

Zhao Jian-Jun(赵建军)a)b)†, Xing Ru(邢茹)a), Lu Yi(鲁毅)a), Haosibayar(浩斯巴雅尔)a), Zhao Ming-Yu(赵明宇)a), Jin Xiang(金香)a), Zheng Lin(郑琳)a), Ning Wei(宁伟)b), Sun Young(孙阳)b), and Cheng Zhao-Hua(成昭华)b)   

  1. a Department of Physics, Baotou Normal University, Inner Mongolia Autonomous Regions, Baotou 014030, China; b State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2008-01-18 Revised:2008-03-04 Online:2008-07-09 Published:2008-07-09
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 50672126) and the Inner Mongolia Natural Science Foundation of China (Grant No 200607010102).

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摘要： We have performed magnetization measurements and electron spin resonance (ESR) on polycrystalline manganites of Nd$_{0.5}$Sr$_{0.5 - x}$Ba$_{x}$MnO$_{3}$ ($x = 0.1$). Phase separation and phase transitions are observed from the susceptibility and the ESR spectra data. Between 260\,K ($\sim T_{\rm C})$ and 185\,K ($\sim T_{\rm N})$, the system coexists of the paramagnetic phase and the ferromagnetic (FM) phase. Between 185\,K and 140\,K, the system coexists of the FM phase and the antiferromagnetic (AFM) phase. These results indicate that the system has a very complex magnetic state due to the origin of the instability stemming from manganite Nd$_{0.5}$Sr$_{0.4}$Ba$_{0.1}$MnO$_{3}$ by partially substituting the larger Ba$^{2 + }$ ions for the smaller Sr$^{2 + }$ ions.

关键词: manganite, electron spin resonance, phase separation

Abstract: We have performed magnetization measurements and electron spin resonance (ESR) on polycrystalline manganites of Nd$_{0.5}$Sr$_{0.5 - x}$Ba$_{x}$MnO$_{3}$ ($x = 0.1$). Phase separation and phase transitions are observed from the susceptibility and the ESR spectra data. Between 260 K ($\sim T_{\rm C})$ and 185 K ($\sim T_{\rm N})$, the system coexists of the paramagnetic phase and the ferromagnetic (FM) phase. Between 185 K and 140 K, the system coexists of the FM phase and the antiferromagnetic (AFM) phase. These results indicate that the system has a very complex magnetic state due to the origin of the instability stemming from manganite Nd$_{0.5}$Sr$_{0.4}$Ba$_{0.1}$MnO$_{3}$ by partially substituting the larger Ba$^{2 + }$ ions for the smaller Sr$^{2 + }$ ions.

Key words: manganite, electron spin resonance, phase separation

中图分类号:  (Magnetization curves, hysteresis, Barkhausen and related effects)

  • 75.60.Ej
75.30.Cr (Saturation moments and magnetic susceptibilities) 75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)) 75.50.Dd (Nonmetallic ferromagnetic materials) 75.50.Ee (Antiferromagnetics) 76.30.Lh (Other ions and impurities)