Effect of the change in the interface structure of Pd(100)/SrTiO3 for quantum-well induced ferromagnetism

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:423

Article

Sakuragi, Shunsuke¹  Ogawa, Tomoyuki²  Sato, Tetsuya¹ 

[1] Keio Univ, Fac Sci & Technol, Dept Appl Phys & Physicoinformat, Yokohama, Kanagawa 2230061, Japan

[2] Tohoku Univ, Grad Sch Engn, Dept Elect Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan

关键词: Pd ultrathin films;    Quantum-well states;    Ferromagnetism;    Interface structure;   

DOI  :  10.1016/j.jmmm.2016.09.073

来源: Elsevier

【 摘 要 】

Measurements of temperature dependent magnetization of Pd(100) ultrathin films on SrTiO3(100) substrates which shows quantum-well induced ferromagnetism were performed. We observed the jump in magnetization of Pd(100) due to the structural phase transition of SrTiO3, and then, the disappearance of ferromagnetism after temperature-cycle repetition. X-ray reflectivity measurement revealed that the density of a few layers in the Pd film decreased near the Pd/SrTiO3 interface after temperature cycles. This suggests that the structural change affects the quantum-well induced ferromagnetism, and lowering of the crystallinity of Pd at the interface has a negative effect on quantum-well induced ferromagnetism of Pd(100) ultrathin films.

【 授权许可】

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