Change in magnetization of ferromagnetic Pd(001) ultrathin films induced by the strain effect of BaTiO3

We demonstrate changes in the saturation magnetization of Pd(001) ultrathin films exhibiting ferromagnetism in Pd/SrTiO3/BaTiO3 heterostructures due to the strain effect caused by the structural phase transition of BaTiO3 substrates. When a BaTiO3 substrate with a single domain formed by voltage app...

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Veröffentlicht in:Applied physics letters 2018-04, Vol.112 (14)
Hauptverfasser: Ban, Yusuke, Komatsu, Katsuyoshi, Sakuragi, Shunsuke, Taniyama, Tomoyasu, Kageshima, Hiroyuki, Sato, Tetsuya
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Sprache:eng
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Zusammenfassung:We demonstrate changes in the saturation magnetization of Pd(001) ultrathin films exhibiting ferromagnetism in Pd/SrTiO3/BaTiO3 heterostructures due to the strain effect caused by the structural phase transition of BaTiO3 substrates. When a BaTiO3 substrate with a single domain formed by voltage application transitioned from the orthorhombic phase to the tetragonal phase, the saturation magnetization of Pd decreased by about 5%. The first-principles calculations, which assumed the distortion accompanied by the orthorhombic to the tetragonal structural phase transition, indicated a decrease by 3%–4% in the magnetization, which was consistent with the experimental results.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.5020956