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Exchange Bias Effect and Magnetic Properties in La0.7Sr0.3MnO3-NiO Nanocomposite Films
X. K. Ning; Z. J. Wang; X. G. Zhao; C. W. Shih; W. C. Chang; Z. D. Zhang
2014
Source PublicationIeee Transactions on Magnetics
ISSN0018-9464
Volume50Issue:1
AbstractThe magnetic exchange coupling effect has been investigated in La0.7Sr0.3MnO3 (LSMO)-NiO nanocomposite films prepared by pulsed laser deposition on SrTiO3 (001) and (110) single crystal substrates. The films show an enhanced coercivity field H-C = 560 Oe compared with the same thickness single pure LSMO thin film. The composite films exhibit a large exchange bias field H-E = 140 Oe after applying a 4000 Oe field cooling. The values of the exchange bias field decrease with increasing temperature and become zero at about 45 K, which corresponds to the conventional exchange bias blocking temperature (T-B), regardless of epitaxial growth directions on (001) or (110) SrTiO3 substrates. We speculate that there may be magnetic interaction at the NiO and LSMO boundaries or charge transfer between the Ni and Mn ions, resulting in the formation of ferromagnetic interaction at the interface. The Curie temperature T-C decreased from 340 K of the LSMO single film to 200 K of the nanocomposite film. The results demonstrate that the magnetic state of the composite film is directly related to the Mn-O-Mn and Mn-O-Ni spin interaction energy. In addition to this, the Mn-O-Ni at the boundary may also form the magnetic region that pins the ferromagnetic LSMO phase.
description.department[ning, xingkun ; wang, zhan jie ; zhao, xinguo ; zhang, zhidong] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [ning, xingkun ; wang, zhan jie ; zhao, xinguo ; zhang, zhidong] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china. [zhao, xinguo ; shih, chih-wei ; chang, wen-cheng] natl chung cheng univ, dept phys, chiayi 621, taiwan. ; wang, zj (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. ; wangzj@imr.ac.cn
KeywordExchange Bias (Eb) Magnetic Transport Properties Pulse Laser Deposition (Pld) Low-field Magnetoresistance Magnetotransport Properties Thin-films Composite
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/72364
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
X. K. Ning,Z. J. Wang,X. G. Zhao,et al. Exchange Bias Effect and Magnetic Properties in La0.7Sr0.3MnO3-NiO Nanocomposite Films[J]. Ieee Transactions on Magnetics,2014,50(1).
APA X. K. Ning,Z. J. Wang,X. G. Zhao,C. W. Shih,W. C. Chang,&Z. D. Zhang.(2014).Exchange Bias Effect and Magnetic Properties in La0.7Sr0.3MnO3-NiO Nanocomposite Films.Ieee Transactions on Magnetics,50(1).
MLA X. K. Ning,et al."Exchange Bias Effect and Magnetic Properties in La0.7Sr0.3MnO3-NiO Nanocomposite Films".Ieee Transactions on Magnetics 50.1(2014).
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