Thickness-dependent appearance of ferromagnetism in Pd(100) ultrathin films

被引：23

作者：

Sakuragi, S. ^{[1
]}

Sakai, T. ^{[1
,2
]}

Urata, S. ^{[1
]}

Aihara, S. ^{[1
,2
]}

Shinto, A. ^{[1
]}

Kageshima, H. ^{[2
]}

Sawada, M. ^{[3
]}

Namatame, H. ^{[3
]}

Taniguchi, M. ^{[3
,4
]}

Sato, T. ^{[1
]}

机构：

[1] Keio Univ, Fac Sci & Technol, Dept Appl Phys & Physicoinformat, Yokohama, Kanagawa 2238522, Japan

[2] NTT Corp, NTT Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

[3] Hiroshima Univ, Hiroshima Synchrotron Radiat Ctr, Higashihiroshima 7390046, Japan

[4] Hiroshima Univ, Grad Sch Sci, Higashihiroshima 7398526, Japan

来源：

PHYSICAL REVIEW B | 2014年 / 90卷 / 05期

关键词：

QUANTUM-WELL STATES; THIN-FILMS; PD; 4D; SRTIO3; MONOLAYERS; MAGNETISM; SURFACE; RH;

D O I：

10.1103/PhysRevB.90.054411

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the appearance of ferromagnetism in thin films of Pd(100), which depends on film thickness in the range of 3-5 nm on SrTiO3(100) substrates. X-ray magnetic circular dichroism measurement shows the intrinsic nature of ferromagnetism in Pd(100) films. The spontaneous magnetization in Pd(100) films, corresponding to is 0.61 mu(B)/atom, is comparable to Ni, and it changes in an oscillatory manner depending on film thickness, where the period quantitatively agrees with the theoretical prediction based on the two-dimensional quantum well in the film. This indicates that the discrete electronic states in the quantum well shift to Fermi energy to satisfy the condition for ferromagnetism (Stoner criterion) at a specific film thickness.

引用

页数：5

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