Anomalous exchange bias at collinear/noncollinear spin interface

We report on the interfacial magnetic coupling in manganite bilayers of collinear ferromagnetic La 0.7 Sr 0.3 MnO 3 and noncollinear multiferroic TbMnO 3 . Exchange bias is observed at the Néel temperature of TbMnO 3 (~41 K) due to the onset of long-range antiferromagnetic ordering in the Mn spin su...

Full description

Saved in:
Bibliographic Details
Published in:Scientific reports 2013-01, Vol.3 (1), p.1094, Article 1094
Main Authors: Tian, Y. F., Ding, J. F., Lin, W. N., Chen, Z. H., David, A., He, M., Hu, W. J., Chen, L., Wu, T.
Format: Article
Language:English
Subjects:
639/301/119/1001
639/766/119/544
639/766/119/997
639/766/25
Applied physics
Bias
Chemical Sciences
Humanities and Social Sciences
Interfaces
Material chemistry
multidisciplinary
Science
Temperature effects
Thin films
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report on the interfacial magnetic coupling in manganite bilayers of collinear ferromagnetic La 0.7 Sr 0.3 MnO 3 and noncollinear multiferroic TbMnO 3 . Exchange bias is observed at the Néel temperature of TbMnO 3 (~41 K) due to the onset of long-range antiferromagnetic ordering in the Mn spin sublattice. Interestingly, an anomalous plateau of exchange bias emerges at the ordering temperature of Tb spins (~10 K) and we ascribe this unique feature to the strong coupling between Tb and Mn spin sublattices in TbMnO 3 , which in turn influences the magnetic coupling across the interface. On the other hand, the enhancement of coercivity in La 0.7 Sr 0.3 MnO 3 /TbMnO 3 shows monotonous temperature dependence. Our results illustrate a strong interfacial magnetic interaction at the La 0.7 Sr 0.3 MnO 3 /TbMnO 3 interface, highlighting the roles of competing spin orders, magnetic frustration and coupling between multiple spin sublattices in artificial collinear/noncollinear spin heterostructures.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep01094