Epitaxial growth and magnetic characterization of ferromagnetic Co4N thin films on SrTiO3(001) substrates by molecular beam epitaxy

被引：36

作者：

Ito, Keita ^{[1
]}

Harada, Kazunori ^{[1
]}

Toko, Kaoru ^{[1
]}

Akinaga, Hiro ^{[2
]}

Suemasu, Takashi ^{[1
]}

机构：

[1] Univ Tsukuba, Inst Appl Phys, Tsukuba, Ibaraki 3058573, Japan

[2] ICAN, Natl Inst Adv Ind Sci & Technol AST, Tsukuba, Ibaraki 3058569, Japan

来源：

JOURNAL OF CRYSTAL GROWTH | 2011年 / 336卷 / 01期

关键词：

Molecular beam epitaxy; Co4N; SrTiO3; Ferromagnetic material; PHASE;

D O I：

10.1016/j.jcrysgro.2011.09.038

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

We have attempted to grow single-crystalline Co4N thin films on SrTiO3 (STO)(001) substrates by molecular beam epitaxy by the simultaneous supply of 3N-Co and radio-frequency NH3 plasma. Reflection high-energy electron diffraction and theta-2 theta X-ray diffraction patterns confirmed that the epitaxial growth of Co4N films was successfully achieved. X-ray phi-scan measurements using Co4N(301) and STO(301) diffractions revealed that the epitaxial relationship between Co4N and STO was a cube-on-cube type. Magnetization versus magnetic field curves measured at room temperature for Co4N epitaxial layers covered with a Au capping layer using a vibrating sample magnetometer showed that Co4N[110] is the axis of easy magnetization. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：40 / 43

页数：4

共 11 条

[1] Phase transition behavior of reactive sputtering deposited Co-N thin films using transmission electron microscopy [J].

Fang, JS ;

Yang, LC ;

Hsu, CS ;

Chen, GS ;

Lin, YW ;

Chen, GS .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A, 2004, 22 (03) :698-704

[2] MAGNETIC ANISOTROPIES AND EXCHANGE COUPLING IN ULTRATHIN FCC CO(001) STRUCTURES [J].

HEINRICH, B ;

COCHRAN, JF ;

KOWALEWSKI, M ;

KIRSCHNER, J ;

CELINSKI, Z ;

ARROTT, AS ;

MYRTLE, K .

PHYSICAL REVIEW B, 1991, 44 (17) :9348-9361

[3] Relations of electronic energies and magnetic moments of tetra-3d metal (Mn, Fe, Co and Ni) nitrides calculated using a plane-wave basis method [J].

Imai, Yoji ;

Takahashi, Yasuhiko ;

Kumagai, Toshiya .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2010, 322 (18) :2665-2669

[4] Spin and orbital magnetic moments of molecular beam epitaxy γ′-Fe4N films on LaAlO3(001) and MgO(001) substrates by x-ray magnetic circular dichroism [J].

Ito, K. ;

Lee, G. H. ;

Harada, K. ;

Suzuno, M. ;

Suemasu, T. ;

Takeda, Y. ;

Saitoh, Y. ;

Ye, M. ;

Kimura, A. ;

Akinaga, H. .

APPLIED PHYSICS LETTERS, 2011, 98 (10)

[5] Molecular beam epitaxy of ferromagnetic γ′-Fe4N thin films on LaAlO3(100), SrTiO3(100) and MgO(100) substrates [J].

Ito, Keita ;

Lee, Geun Hyoung ;

Akinaga, Hiro ;

Suemasu, Takashi .

JOURNAL OF CRYSTAL GROWTH, 2011, 322 (01) :63-68

[6] Synthesis and characteristics of nanocrystalline Co/N thin film containing CO4N phase [J].

Jia, Hui ;

Wang, Xin ;

Zheng, Weitao ;

Chen, Yan ;

Feng, Shouhua .

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS, 2008, 150 (02) :121-124

[7] ATOMIC CONTROL OF THE SRTIO3 CRYSTAL-SURFACE [J].

KAWASAKI, M ;

TAKAHASHI, K ;

MAEDA, T ;

TSUCHIYA, R ;

SHINOHARA, M ;

ISHIYAMA, O ;

YONEZAWA, T ;

YOSHIMOTO, M ;

KOINUMA, H .

SCIENCE, 1994, 266 (5190) :1540-1542

[8] Theoretical analysis of highly spin-polarized transport in the iron nitride Fe4N [J].

Kokado, Satoshi ;

Fujima, Nobuhisa ;

Harigaya, Kikuo ;

Shimizu, Hisashi ;

Sakuma, Akimasa .

PHYSICAL REVIEW B, 2006, 73 (17)

[9] Spin polarization of Fe4N thin films determined by point-contact Andreev reflection [J].

Narahara, A. ;

Ito, K. ;

Suemasu, T. ;

Takahashi, Y. K. ;

Ranajikanth, A. ;

Hono, K. .

APPLIED PHYSICS LETTERS, 2009, 94 (20)

[10] PREPARATION OF CO-N FILMS BY RF-SPUTTERING [J].

ODA, K ;

YOSHIO, T ;

ODA, K .

JOURNAL OF MATERIALS SCIENCE, 1987, 22 (08) :2729-2733

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