Interfacial spin glass state and exchange bias in manganite bilayers with competing magnetic orders

J. F. Ding; O. I. Lebedev; S. Turner; Y. F. Tian; W. J. Hu; J. W. Seo; C. Panagopoulos; W. Prellier; G. Van Tendeloo; T. Wu

doi:10.1103/PhysRevB.87.054428

Interfacial spin glass state and exchange bias in manganite bilayers with competing magnetic orders

J. F. Ding^*, O. I. Lebedev, S. Turner, Y. F. Tian, W. J. Hu, J. W. Seo, C. Panagopoulos, W. Prellier, G. Van Tendeloo, T. Wu

^*Corresponding author for this work

Physical Sciences and Engineering

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

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Abstract

The magnetic properties of manganite bilayers composed of G-type antiferromagnetic (AFM) SrMnO₃ and double-exchange ferromagnetic (FM) La_0.7Sr_0.3MnO₃ are studied. A spin-glass state is observed as a result of competing magnetic orders and spin frustration at the La_0.7Sr_0.3MnO₃/SrMnO₃ interface. The dependence of the irreversible temperature on the cooling magnetic field follows the Almeida-Thouless line. Although an ideal G-type AFM SrMnO ₃ is featured with a compensated spin configuration, the bilayers exhibit exchange bias below the spin glass freezing temperature, which is much lower than the Néel temperature of SMO, indicating that the exchange bias is strongly correlated with the spin glass state. The results indicate that the spin frustration that originates from the competition between the AFM super-exchange and the FM double-exchange interactions can induce a strong magnetic anisotropy at the La_0.7Sr_0.3MnO ₃/SrMnO₃ interface.

Original language	English (US)
Article number	054428
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	87
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.87.054428
State	Published - Feb 21 2013

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Ding, J. F., Lebedev, O. I., Turner, S., Tian, Y. F., Hu, W. J., Seo, J. W., Panagopoulos, C., Prellier, W., Van Tendeloo, G., & Wu, T. (2013). Interfacial spin glass state and exchange bias in manganite bilayers with competing magnetic orders. Physical Review B - Condensed Matter and Materials Physics, 87(5), Article 054428. https://doi.org/10.1103/PhysRevB.87.054428

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title = "Interfacial spin glass state and exchange bias in manganite bilayers with competing magnetic orders",

abstract = "The magnetic properties of manganite bilayers composed of G-type antiferromagnetic (AFM) SrMnO3 and double-exchange ferromagnetic (FM) La0.7Sr0.3MnO3 are studied. A spin-glass state is observed as a result of competing magnetic orders and spin frustration at the La0.7Sr0.3MnO3/SrMnO3 interface. The dependence of the irreversible temperature on the cooling magnetic field follows the Almeida-Thouless line. Although an ideal G-type AFM SrMnO 3 is featured with a compensated spin configuration, the bilayers exhibit exchange bias below the spin glass freezing temperature, which is much lower than the N{\'e}el temperature of SMO, indicating that the exchange bias is strongly correlated with the spin glass state. The results indicate that the spin frustration that originates from the competition between the AFM super-exchange and the FM double-exchange interactions can induce a strong magnetic anisotropy at the La0.7Sr0.3MnO 3/SrMnO3 interface.",

author = "Ding, {J. F.} and Lebedev, {O. I.} and S. Turner and Tian, {Y. F.} and Hu, {W. J.} and Seo, {J. W.} and C. Panagopoulos and W. Prellier and {Van Tendeloo}, G. and T. Wu",

year = "2013",

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doi = "10.1103/PhysRevB.87.054428",

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AU - Ding, J. F.

AU - Lebedev, O. I.

AU - Turner, S.

AU - Tian, Y. F.

AU - Hu, W. J.

AU - Seo, J. W.

AU - Panagopoulos, C.

AU - Prellier, W.

AU - Van Tendeloo, G.

AU - Wu, T.

PY - 2013/2/21

Y1 - 2013/2/21

N2 - The magnetic properties of manganite bilayers composed of G-type antiferromagnetic (AFM) SrMnO3 and double-exchange ferromagnetic (FM) La0.7Sr0.3MnO3 are studied. A spin-glass state is observed as a result of competing magnetic orders and spin frustration at the La0.7Sr0.3MnO3/SrMnO3 interface. The dependence of the irreversible temperature on the cooling magnetic field follows the Almeida-Thouless line. Although an ideal G-type AFM SrMnO 3 is featured with a compensated spin configuration, the bilayers exhibit exchange bias below the spin glass freezing temperature, which is much lower than the Néel temperature of SMO, indicating that the exchange bias is strongly correlated with the spin glass state. The results indicate that the spin frustration that originates from the competition between the AFM super-exchange and the FM double-exchange interactions can induce a strong magnetic anisotropy at the La0.7Sr0.3MnO 3/SrMnO3 interface.

AB - The magnetic properties of manganite bilayers composed of G-type antiferromagnetic (AFM) SrMnO3 and double-exchange ferromagnetic (FM) La0.7Sr0.3MnO3 are studied. A spin-glass state is observed as a result of competing magnetic orders and spin frustration at the La0.7Sr0.3MnO3/SrMnO3 interface. The dependence of the irreversible temperature on the cooling magnetic field follows the Almeida-Thouless line. Although an ideal G-type AFM SrMnO 3 is featured with a compensated spin configuration, the bilayers exhibit exchange bias below the spin glass freezing temperature, which is much lower than the Néel temperature of SMO, indicating that the exchange bias is strongly correlated with the spin glass state. The results indicate that the spin frustration that originates from the competition between the AFM super-exchange and the FM double-exchange interactions can induce a strong magnetic anisotropy at the La0.7Sr0.3MnO 3/SrMnO3 interface.

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DO - 10.1103/PhysRevB.87.054428

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JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

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Interfacial spin glass state and exchange bias in manganite bilayers with competing magnetic orders

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