Thickness-dependent magnetic properties and strain-induced orbital magnetic moment in SrRuO3 thin films

被引：47

作者：

Ishigami, K. ^{[1
]}

Yoshimatsu, K. ^{[2
]}

Toyota, D. ^{[2
]}

Takizawa, M. ^{[1
]}

Yoshida, T. ^{[1
]}

Shibata, G. ^{[1
]}

Harano, T. ^{[1
]}

Takahashi, Y. ^{[1
]}

Kadono, T. ^{[1
]}

Verma, V. K. ^{[1
]}

Singh, V. R. ^{[1
]}

Takeda, Y. ^{[3
]}

Okane, T. ^{[3
]}

Saitoh, Y. ^{[3
]}

Yamagami, H. ^{[3
]}

Koide, T. ^{[4
]}

Oshima, M. ^{[2
]}

Kumigashira, H. ^{[2
,4
]}

Fujimori, A. ^{[1
,3
,5
]}

机构：

[1] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

[2] Univ Tokyo, Dept Appl Chem, Bunkyo Ku, Tokyo 1138656, Japan

[3] Japan Atom Energy Agcy, Quantum Beam Sci Directorate, Sayo, Hyogo 6795148, Japan

[4] High Energy Accelerator Res Org, IMSS, Photon Factory, Tsukuba, Ibaraki 3050801, Japan

[5] Univ Tokyo, Dept Complex Sci & Engn, Kashiwa, Chiba 2770882, Japan

来源：

PHYSICAL REVIEW B | 2015年 / 92卷 / 06期

关键词：

RAY CIRCULAR-DICHROISM; ELECTRONIC-STRUCTURE; ANISOTROPY;

D O I：

10.1103/PhysRevB.92.064402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Thin films of the ferromagnetic metal SrRuO3 (SRO) show a varying easy magnetization axis depending on the epitaxial strain, and undergo a metal-to-insulator transition with decreasing film thickness. We have investigated the magnetic properties of SRO thin films with varying thicknesses fabricated on SrTiO3(001) substrates by soft x-ray magnetic circular dichroism at the Ru M-2,M-3 edge. Results have shown that, with decreasing film thickness, the film changes from ferromagnetic to nonmagnetic at around 3 monolayer thickness, consistent with previous magnetization and magneto-optical Kerr effect measurements. The orbital magnetic moment perpendicular to the film was found to be similar to 0.1 mu(B)/Ru, and remained nearly unchanged with decreasing film thickness while the spin magnetic moment decreases. A mechanism for the formation of the orbital magnetic moment is discussed based on the electronic structure of the compressively strained SRO film.

引用

页数：5

共 19 条

[1] Electronic and spin states of SrRuO3 thin films: An x-ray magnetic circular dichroism study
Agrestini, S.
Hu, Z.
Kuo, C. -Y.
Haverkort, M. W.
Ko, K. -T.
Hollmann, N.
Liu, Q.
Pellegrin, E.
Valvidares, M.
Herrero-Martin, J.
Gargiani, P.
Gegenwart, P.
Schneider, M.
Esser, S.
Tanaka, A.
Komarek, A. C.
Tjeng, L. H.
[J]. PHYSICAL REVIEW B, 2015, 91 (07):
[2] TIGHT-BINDING APPROACH TO THE ORBITAL MAGNETIC-MOMENT AND MAGNETOCRYSTALLINE ANISOTROPY OF TRANSITION-METAL MONOLAYERS
BRUNO, P
[J]. PHYSICAL REVIEW B, 1989, 39 (01): : 865 - 868
[3] X-RAY CIRCULAR-DICHROISM AND LOCAL MAGNETIC-FIELDS
CARRA, P
THOLE, BT
ALTARELLI, M
WANG, XD
[J]. PHYSICAL REVIEW LETTERS, 1993, 70 (05) : 694 - 697
[4] Evidence of high-spin Ru and universal magnetic anisotropy in SrRuO3 thin films
Grutter, A. J.
Wong, F. J.
Arenholz, E.
Vailionis, A.
Suzuki, Y.
[J]. PHYSICAL REVIEW B, 2012, 85 (13)
[5] High-resolution synchrotron-radiation photoemission characterization for atomically-controlled SrTiO3(001) substrate surfaces subjected to various surface treatments
Kobayashi, D
Kumigashira, H
Oshima, M
Ohnishi, T
Lippmaa, M
Ono, K
Kawasaki, M
Koinuma, H
[J]. JOURNAL OF APPLIED PHYSICS, 2004, 96 (12) : 7183 - 7188
[6] Li P., 2006, CHINESE PHYS LETT, V23, P2225
[7] Evolution of the electronic structure of a ferromagnetic metal: Case of SrRuO3
Mahadevan, Priya
Aryasetiawan, F.
Janotti, A.
Sasaki, T.
[J]. PHYSICAL REVIEW B, 2009, 80 (03):
[8] Soft x-ray magnetic circular dichroism study of Ca1-xSrxRuO3 across the ferromagnetic quantum phase transition
Okamoto, J.
Okane, T.
Saitoh, Y.
Terai, K.
Fujimori, S. -I.
Muramatsu, Y.
Yoshii, K.
Mamiya, K.
Koide, T.
Fujimori, A.
Fang, Z.
Takeda, Y.
Takano, M.
[J]. PHYSICAL REVIEW B, 2007, 76 (18)
[9] Correlation effects in the electronic structure of SrRuO3
Okamoto, J
Mizokawa, T
Fujimori, A
Hase, I
Nohara, M
Takagi, H
Takeda, Y
Takano, M
[J]. PHYSICAL REVIEW B, 1999, 60 (04): : 2281 - 2285
[10] Substitution at the Ru site in the itinerant ferromagnet SrRuO3
Pi, L
Maignan, A
Retoux, R
Raveau, B
[J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2002, 14 (31) : 7391 - 7398

← 1 2 →