講演情報
[10p-N303-3]Enhancement of orbital magnetic moment via epitaxial lift-off of La2/3Sr1/3MnO3
〇Takahito Takeda1, Takuma Arai2, Daigo Matsubara2, Kohei Yamagami3, Le Duc Anh2,4, Masaaki Tanaka2,4, Masaki Kobayashi2,4, Shinobu Ohya2,4 (1.Dept. Chemsys, The Univ. of Tokyo, 2.Dept. EEIS, The Univ. of Tokyo, 3.JASRI, 4.CSRN, The Univ. of Tokyo)
キーワード：
oxide、ferromagnetic、XMCD
Perovskite oxide La2/3Sr1/3MnO3 (LSMO) is a promising ferromagnetic material due to its high Curie temperature (>300 K) and half-metallicity, attributed to double-exchange interactions. However, its magnetic and conductive properties degrade near interfaces, known as the "dead layer", due to effects like epitaxial strain and octahedral rotations. Epitaxial lift-off using a water-soluble buffer layer has been shown to reduce this dead layer and enhance magnetization and Curie temperature. In this study, We epitaxially grew an LSMO/Sr4Al2O7 heterostructure on an STO substrate and transferred to a Si substrate after lift-off. The LSMO membrane shows improved magnetic properties. X-ray absorption and XMCD analyses revealed that strain release enhances orbital magnetic moments and reduces anisotropy, explaining the improved ferromagnetism.