Strain effect on the magnetic and transport properties of LaCoO3 thin films

Y. Li; S. J. Peng; D. J. Wang; K. M. Wu; S. H. Wang

doi:10.1063/1.5006280

Strain effect on the magnetic and transport properties of LaCoO₃ thin films

Y. Li, S. J. Peng, D. J. Wang, K. M. Wu, S. H. Wang

物理科学与技术学院

Wuhan University of Science and Technology

科研成果: 期刊稿件 › 文章 › 同行评审

16 引用（Scopus）

摘要

LaCoO₃ (LCO) has attracted much attention due to the unique magnetic transition and spin transition of Co³⁺ ions. Epitaxial LCO film exhibits an unexpected ferromagnetism, in contrast to the non-magnetism of bulk LCO. An in-depth study on the property of strained LCO film is of great importance. We have fabricated 30 nm LCO films on various substrates and studied the magnetic and transport properties of films in different strain states (compressed strain for LCO/LaAlO₃, tensile strain for LCO/(LaAlO₃)_0.3(Sr₂TaAlO₆)_0.35, SrTiO₃). The in-plane tensiled LCO films exhibit ferromagnetic ground state at 5K and magnetic transition with T_C around 85K, while compressed LCO/LaAlO₃ film has a negligibly small moment signal. Our results reveal that in-plane tensile strain and tetragonal distortion are much more favorable for stabilizing the FM order in LCO films.

源语言	英语
文章编号	056317
期刊	AIP Advances
卷	8
期	5
DOI	https://doi.org/10.1063/1.5006280
出版状态	已出版 - 1 5月 2018

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abstract = "LaCoO3 (LCO) has attracted much attention due to the unique magnetic transition and spin transition of Co3+ ions. Epitaxial LCO film exhibits an unexpected ferromagnetism, in contrast to the non-magnetism of bulk LCO. An in-depth study on the property of strained LCO film is of great importance. We have fabricated 30 nm LCO films on various substrates and studied the magnetic and transport properties of films in different strain states (compressed strain for LCO/LaAlO3, tensile strain for LCO/(LaAlO3)0.3(Sr2TaAlO6)0.35, SrTiO3). The in-plane tensiled LCO films exhibit ferromagnetic ground state at 5K and magnetic transition with TC around 85K, while compressed LCO/LaAlO3 film has a negligibly small moment signal. Our results reveal that in-plane tensile strain and tetragonal distortion are much more favorable for stabilizing the FM order in LCO films.",

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AU - Li, Y.

AU - Peng, S. J.

AU - Wang, D. J.

AU - Wu, K. M.

AU - Wang, S. H.

PY - 2018/5/1

Y1 - 2018/5/1

N2 - LaCoO3 (LCO) has attracted much attention due to the unique magnetic transition and spin transition of Co3+ ions. Epitaxial LCO film exhibits an unexpected ferromagnetism, in contrast to the non-magnetism of bulk LCO. An in-depth study on the property of strained LCO film is of great importance. We have fabricated 30 nm LCO films on various substrates and studied the magnetic and transport properties of films in different strain states (compressed strain for LCO/LaAlO3, tensile strain for LCO/(LaAlO3)0.3(Sr2TaAlO6)0.35, SrTiO3). The in-plane tensiled LCO films exhibit ferromagnetic ground state at 5K and magnetic transition with TC around 85K, while compressed LCO/LaAlO3 film has a negligibly small moment signal. Our results reveal that in-plane tensile strain and tetragonal distortion are much more favorable for stabilizing the FM order in LCO films.

AB - LaCoO3 (LCO) has attracted much attention due to the unique magnetic transition and spin transition of Co3+ ions. Epitaxial LCO film exhibits an unexpected ferromagnetism, in contrast to the non-magnetism of bulk LCO. An in-depth study on the property of strained LCO film is of great importance. We have fabricated 30 nm LCO films on various substrates and studied the magnetic and transport properties of films in different strain states (compressed strain for LCO/LaAlO3, tensile strain for LCO/(LaAlO3)0.3(Sr2TaAlO6)0.35, SrTiO3). The in-plane tensiled LCO films exhibit ferromagnetic ground state at 5K and magnetic transition with TC around 85K, while compressed LCO/LaAlO3 film has a negligibly small moment signal. Our results reveal that in-plane tensile strain and tetragonal distortion are much more favorable for stabilizing the FM order in LCO films.

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Strain effect on the magnetic and transport properties of LaCoO3 thin films

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Strain effect on the magnetic and transport properties of LaCoO₃ thin films