Perpendicular magnetic anisotropy in La1xSrxCoO2.5+δ/La2/3Sr1/3MnO3/La1xSrxCoO2.5+δ trilayers (x=0.050.5)

Jine Zhang, Furong Han, Wei Wang, Xi Shen, Jing Zhang, Hui Zhang, Hailin Huang, Hongrui Zhang, Xiaobing Chen, Shaojin Qi, Yuansha Chen, Fengxia Hu, Shishen Yan, Baogen Shen, Richeng Yu, and Jirong Sun
Phys. Rev. B 100, 094432 – Published 19 September 2019
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Abstract

Perpendicular magnetic anisotropy (PMA) of magnetic materials has received much attention because of its potential application to spintronics devices. In general, the tensely strained (001)La2/3Sr1/3MnO3 (LSMO) layer is easy plane. Here we demonstrate that the tensile LSMO layer will exhibit an out-of-plane magnetic anisotropy if it is sandwiched between two La1xSrxCoO2.5+δ (LSCO) layers. The most remarkable observation is that the PMA enhances with the increase of the Sr content in LSCO. It is 2.7×106erg/cm3 for x=0.05 and 4.3×106erg/cm3 for x=0.5. This value is two orders of magnitude greater than that obtained by compressively straining the LSMO film (104erg/cm3). Analysis of high resolution lattice image shows the formation of perovskite/brownmillerite-type interfaces in the multilayers: Brownmillerite-like lattice structure forms in the interfacial layers of LSCO, resulting in a coherent tilting of adjacent MnO6 octahedra. This in turn leads to, as evidenced by the analysis of x-ray linear dichroism, selective orbital occupation thus spin reorientation. There is evidence that the brownmillerite-structured LSCO is more easily formed when x is high, which explains the growth of anisotropy constant with the increase of Sr content.

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  • Received 17 December 2018
  • Revised 26 July 2019

DOI:https://doi.org/10.1103/PhysRevB.100.094432

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Jine Zhang1,2, Furong Han1,2, Wei Wang1,2, Xi Shen1,2, Jing Zhang1,2, Hui Zhang1,2, Hailin Huang1,2, Hongrui Zhang1,2, Xiaobing Chen1,2, Shaojin Qi1,2, Yuansha Chen1,2, Fengxia Hu1,2,3, Shishen Yan4, Baogen Shen1,2,3, Richeng Yu1,2, and Jirong Sun1,2,3,*

  • 1Beijing National Laboratory for Condensed Matter Physics & Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
  • 2School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
  • 3Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
  • 4Spintronics Institute, University of Jinan, Jinan, Shandong, 250022, People's Republic of China

  • *Corresponding author: jrsun@iphy.ac.cn

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Issue

Vol. 100, Iss. 9 — 1 September 2019

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