Anomalous exchange bias at collinear/noncollinear spin interface

Y. F. Tian; J. F. Ding; W. N. Lin; Z. H. Chen; A. David; M. He; W. J. Hu; L. Chen; T. Wu

doi:10.1038/srep01094

Anomalous exchange bias at collinear/noncollinear spin interface

Y. F. Tian, J. F. Ding, W. N. Lin, Z. H. Chen, A. David, M. He, W. J. Hu, L. Chen, T. Wu^*

^*Corresponding author for this work

Physical Sciences and Engineering

Research output: Contribution to journal › Article › peer-review

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Abstract

We report on the interfacial magnetic coupling in manganite bilayers of collinear ferromagnetic La_0.7 Sr_0.3 MnO₃ and noncollinear multiferroic TbMnO₃. Exchange bias is observed at the Néel temperature of TbMnO₃ (∼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 TbMnO₃, 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/TbMnO₃ shows monotonous temperature dependence. Our results illustrate a strong interfacial magnetic interaction at the La _0.7 Sr 0.3 MnO₃/TbMnO₃ interface, highlighting the roles of competing spin orders, magnetic frustration, and coupling between multiple spin sublattices in artificial collinear/noncollinear spin heterostructures.

Original language	English (US)
Article number	1094
Journal	Scientific Reports
Volume	3
DOIs	https://doi.org/10.1038/srep01094
State	Published - 2013

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@article{f214f8c88d4e4770982b43f347c2e9dd,

title = "Anomalous exchange bias at collinear/noncollinear spin interface",

abstract = "We report on the interfacial magnetic coupling in manganite bilayers of collinear ferromagnetic La0.7 Sr0.3 MnO3 and noncollinear multiferroic TbMnO3. Exchange bias is observed at the N{\'e}el temperature of TbMnO3 (∼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 TbMnO3, which in turn influences the magnetic coupling across the interface. On the other hand, the enhancement of coercivity in La0.7 Sr0.3 MnO 3/TbMnO3 shows monotonous temperature dependence. Our results illustrate a strong interfacial magnetic interaction at the La 0.7 Sr 0.3 MnO3/TbMnO3 interface, highlighting the roles of competing spin orders, magnetic frustration, and coupling between multiple spin sublattices in artificial collinear/noncollinear spin heterostructures.",

author = "Tian, {Y. F.} and Ding, {J. F.} and Lin, {W. N.} and Chen, {Z. H.} and A. David and M. He and Hu, {W. J.} and L. Chen and T. Wu",

note = "Funding Information: The authors acknowledge the support from the National Research Foundation of Singapore.",

year = "2013",

doi = "10.1038/srep01094",

language = "English (US)",

volume = "3",

journal = "Scientific Reports",

issn = "2045-2322",

publisher = "Nature Publishing Group",

}

TY - JOUR

T1 - Anomalous exchange bias at collinear/noncollinear spin interface

AU - Tian, Y. F.

AU - Ding, J. F.

AU - Lin, W. N.

AU - Chen, Z. H.

AU - David, A.

AU - He, M.

AU - Hu, W. J.

AU - Chen, L.

AU - Wu, T.

N1 - Funding Information: The authors acknowledge the support from the National Research Foundation of Singapore.

PY - 2013

Y1 - 2013

N2 - We report on the interfacial magnetic coupling in manganite bilayers of collinear ferromagnetic La0.7 Sr0.3 MnO3 and noncollinear multiferroic TbMnO3. Exchange bias is observed at the Néel temperature of TbMnO3 (∼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 TbMnO3, which in turn influences the magnetic coupling across the interface. On the other hand, the enhancement of coercivity in La0.7 Sr0.3 MnO 3/TbMnO3 shows monotonous temperature dependence. Our results illustrate a strong interfacial magnetic interaction at the La 0.7 Sr 0.3 MnO3/TbMnO3 interface, highlighting the roles of competing spin orders, magnetic frustration, and coupling between multiple spin sublattices in artificial collinear/noncollinear spin heterostructures.

AB - We report on the interfacial magnetic coupling in manganite bilayers of collinear ferromagnetic La0.7 Sr0.3 MnO3 and noncollinear multiferroic TbMnO3. Exchange bias is observed at the Néel temperature of TbMnO3 (∼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 TbMnO3, which in turn influences the magnetic coupling across the interface. On the other hand, the enhancement of coercivity in La0.7 Sr0.3 MnO 3/TbMnO3 shows monotonous temperature dependence. Our results illustrate a strong interfacial magnetic interaction at the La 0.7 Sr 0.3 MnO3/TbMnO3 interface, highlighting the roles of competing spin orders, magnetic frustration, and coupling between multiple spin sublattices in artificial collinear/noncollinear spin heterostructures.

UR - http://www.scopus.com/inward/record.url?scp=84873337053&partnerID=8YFLogxK

U2 - 10.1038/srep01094

DO - 10.1038/srep01094

M3 - Article

AN - SCOPUS:84873337053

SN - 2045-2322

VL - 3

JO - Scientific Reports

JF - Scientific Reports

M1 - 1094

ER -

Anomalous exchange bias at collinear/noncollinear spin interface

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