The analysis of strain states of giant magnetoresistive Pr0.7Sr0.3MnO3/La0.5Ca0.5MnO3/Pr0.7Sr0.3MnO3 trilayers

WANG Haiou1 LIU Hao1 Dai Ping1 TAN Weishi1 WU Xiaoshan2 JIA Quanjie3 LI Xiaolong4 1

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The analysis of strain states of giant magnetoresistive Pr_0.7Sr_0.3MnO₃/La_0.5Ca_0.5MnO₃/Pr_0.7Sr_0.3MnO₃ trilayers

更新时间：2021-03-05

- The analysis of strain states of giant magnetoresistive Pr_0.7Sr_0.3MnO₃/La_0.5Ca_0.5MnO₃/Pr_0.7Sr_0.3MnO₃ trilayers
- NUCLEAR TECHNIQUES Vol. 35, Issue 11, (2012)
- 作者机构：
  
  1. 南京理工大学理学院应用物理系
  2. 南京大学固体微结构物理国家重点实验室南京大学物理系
  3. 中国科学院高能物理研究所
  4. 中国科学院上海应用物理研究所
- 作者简介：
- 基金信息：
  
  国家自然科学基金(批准号:11079022);江苏省自然科学基金(批准号:BK2006204)资助
- DOI：
  CLC： TB383.2
- Published：01 November 2012
- 稿件说明：
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[1]王海欧,刘昊,戴萍,谭伟石,吴小山,贾全杰,李晓龙.庞磁电阻Pr_(0.7)Sr_(0.3)MnO_3/La_(0.5)Ca_(0.5)MnO_3/Pr_(0.7)Sr_(0.3)MnO_3三层膜的应变分析[J].核技术,2012,35(11):806-810.

WANG Haiou1 LIU Hao1 Dai Ping1 TAN Weishi1 WU Xiaoshan2 JIA Quanjie3 LI Xiaolong4 1. The analysis of strain states of giant magnetoresistive Pr_0.7Sr_0.3MnO₃/La_0.5Ca_0.5MnO₃/Pr_0.7Sr_0.3MnO₃ trilayers[J]. Nuclear techniques, 2012, 35(11): 806-810.
[1]王海欧,刘昊,戴萍,谭伟石,吴小山,贾全杰,李晓龙.庞磁电阻Pr_(0.7)Sr_(0.3)MnO_3/La_(0.5)Ca_(0.5)MnO_3/Pr_(0.7)Sr_(0.3)MnO_3三层膜的应变分析[J].核技术,2012,35(11):806-810. DOI：

WANG Haiou1 LIU Hao1 Dai Ping1 TAN Weishi1 WU Xiaoshan2 JIA Quanjie3 LI Xiaolong4 1. The analysis of strain states of giant magnetoresistive Pr_0.7Sr_0.3MnO₃/La_0.5Ca_0.5MnO₃/Pr_0.7Sr_0.3MnO₃ trilayers[J]. Nuclear techniques, 2012, 35(11): 806-810. DOI：

摘要

用脉冲激光沉积法在MgO（001）衬底上生长了Pr0.7Sr0.3MnO3/La0.5Ca0.5MnO3/Pr0.7Sr0.3MnO3三层膜

其中Pr0.7Sr0.3MnO3的厚度为36nm

La0.5Ca0.5MnO3厚度分别为6、12、18、24、30和36 nm。通过高分辨X射线衍射的对称扫描和非对称扫描测量了三层膜中Pr0.7Sr0.3MnO3和La0.5Ca0.5MnO3的面外、面内晶格参数

研究了薄膜的晶格应变及其弛豫状况。结果表明

La0.5Ca0.5MnO3厚度的增加使薄膜面外应变完全弛豫

但面内的压应变仍然存在。三层膜应变弛豫状态由块材应变和Jahn-Teller应变共同决定。三层膜的应变弛豫机制与四方畸变的应变弛豫机制不同。块材应变和Jahn-Teller应变之间的相互竞争决定了薄膜的磁输运性质。

Abstract

Pr0.7Sr0.3MnO3/La0.5Ca0.5MnO3/Pr0.7Sr0.3MnO3（PSMO/LCMO/PSMO） trilayers were deposited on（001）-oriented single crystal MgO by pulsed laser deposition.The thickness of both PSMO layers was 36 nm while the thickness of LCMO layer was 6

30 and 36nm

respectively.Out-of-plane and in-plane lattice parameters of trilayers were obtained by using symmetric scanning and asymmetric scanning mode of high resolution X-ray diffraction.Strain states of trilayers have been studied.The results showed that strain relaxation states of trilayers were decided by bulk strain and Jahn-Teller（JT） strain together.The mechanism for strain relaxation in trilayers is different from that for tetragonal distortion.The competition between bulk strain and Jahn-Teller（JT） strain played an important role in the magnetotransport and magnetic properties of trilayers.

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