Paramagnetic effect tuned by magnetic pinning in YBa2Cu3O7-δ/La0.67Sr0.33MnO3 heterostructures

C. Z. Chen; C. B. Cai; L. Peng; Z. Y. Liu; Y. M. Lu; H. W. Wang; X. M. Xie

doi:10.1209/0295-5075/89/37005

All issues

Volume 89 / No 3 (February 2010)

EPL, 89 3 (2010) 37005

Abstract

Issue		EPL Volume 89, Number 3, February 2010


Article Number		37005
Number of page(s)		5
Section		Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI		https://doi.org/10.1209/0295-5075/89/37005
Published online		17 February 2010

EPL, 89 (2010) 37005

Paramagnetic effect tuned by magnetic pinning in YBa₂Cu₃O_7-δ/La_0.67Sr_0.33MnO₃ heterostructures

C. Z. Chen¹^,2, C. B. Cai¹^,2, L. Peng¹, Z. Y. Liu¹, Y. M. Lu¹, H. W. Wang² and X. M. Xie²

¹ Research Center for Superconductors and Applied Technologies, Physics Department, Shanghai University Shanghai, 200444, China
² State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences - Shanghai 200050, China

Received: 7 November 2009
Accepted: 18 January 2010

Abstract

In the present heterostructure of YBa₂Cu₃O_7-δ/La_0.67Sr_0.33MnO₃ (YBCO/LSMO), a paramagnetic moment is observed, increasing monotonically with enhancing applied-field strength during the field-cooled (FC) magnetization process. Such a paramagnetic effect, however, emerges only in those samples where manganite layers are magnetically inhomogeneous, probably arising from the flux compression in the FC process. It is supposed that the flux compression occurs as a result of the strong magnetic pinning, caused by the stress-induced ferromagnetic/antiferromagnetic (FM/AFM) phase separation in the constituent layer of LSMO.

PACS: 74.78.Fk – Multilayer, superlattices, heterostructures / 74.72.-h – Cuprate superconductors / 75.70.Cn – Magnetic properties of interfaces (multilayers, superlattices, heterostructures)

© EPLA, 2010

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