Magnetic Properties of Ultrathin Magnetite Films Grown by Molecular Beam Epitaxy

被引：14

作者：

Arora, S. K. ^{[1
]}

Wu, Han-Chun ^{[1
]}

Yao, Hongzhi ^{[2
]}

Ching, W. Y. ^{[2
]}

Choudhary, R. J. ^{[3
]}

Shvets, I. V. ^{[1
]}

Mryasov, O. N. ^{[4
]}

机构：

[1] Trinity Coll Dublin, Sch Phys, CRANN, Dublin 2, Ireland

[2] Univ Missouri, Dept Phys, Kansas City, MO 64110 USA

[3] UGC DAE Consortium Sci Res, Indore, Madhya Pradesh, India

[4] Seagate Technol, Seagate Res Ctr, Pittsburgh, PA 15222 USA

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2008年 / 44卷 / 11期

基金：

爱尔兰科学基金会;

关键词：

Epitaxial layers; interface phenomena; magnetite; surfaces;

D O I：

10.1109/TMAG.2008.2003173

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Magnetic properties as a function of film thickness (2-55 nm) for magnetite (Fe3O4) thin films grown on MgO (100) substrates show that the small thickness films (<= 5 nm) are ferromagnetic and possess magnetization values which are much greater than that of bulk Fe3O4. The inverse thickness dependence of the magnetization points to an interface related mechanism. Whereas, our detailed spin polarized density functional theoretical calculations suggests that there is only a marginal enhancement in the local spin moments of Fe-atom in the vicinity of the Fe3O4-MgO interface and it turns out that the noncompensation of spin moments between the two magnetic sublattices of spinel Fe3O4 is a major factor contributing to the enhancement of magnetization.

引用

页码：2628 / 2631

页数：4

共 19 条

[1] Anomalous strain relaxation behavior of Fe3O4/MgO (100) heteroepitaxial system grown using molecular beam epitaxy [J].

Arora, S. K. ;

Sofin, R. G. S. ;

Shvets, I. V. ;

Luysberg, M. .

JOURNAL OF APPLIED PHYSICS, 2006, 100 (07)

[2] Magnetoresistance enhancement in epitaxial magnetite films grown on vicinal substrates [J].

Arora, SK ;

Sofin, RGS ;

Shvets, IV .

PHYSICAL REVIEW B, 2005, 72 (13)

[3]

CHENG C, PHYS REV B, V71

[4] Origin of the increased resistivity in epitaxial Fe3O4 films -: art. no. 201101 [J].

Eerenstein, W ;

Palstra, TTM ;

Hibma, T ;

Celotto, S .

PHYSICAL REVIEW B, 2002, 66 (20) :1-4

[5] Spin-polarized transport across sharp antiferromagnetic boundaries [J].

Eerenstein, W ;

Palstra, TTM ;

Saxena, SS ;

Hibma, T .

PHYSICAL REVIEW LETTERS, 2002, 88 (24) :4-247204

[6] Magnetite:: a search for the half-metallic state [J].

Fonin, M. ;

Dedkov, Yu S. ;

Pentcheva, R. ;

Ruediger, U. ;

Guentherodt, G. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2007, 19 (31)

[7] Spin and orbital magnetic moments of Fe3O4 -: art. no. 077204 [J].

Huang, DJ ;

Chang, CF ;

Jeng, HT ;

Guo, GY ;

Lin, HJ ;

Wu, WB ;

Ku, HC ;

Fujimori, A ;

Takahashi, Y ;

Chen, CT .

PHYSICAL REVIEW LETTERS, 2004, 93 (07) :077204-1

[8] Charge-orbital ordering and verwey transition in magnetite [J].

Jeng, HT ;

Guo, GY ;

Huang, DJ .

PHYSICAL REVIEW LETTERS, 2004, 93 (15) :156403-1

[9] Film thickness and temperature dependence of the magnetic properties of pulsed-laser-deposited Fe3O4 films on different substrates -: art. no. 205413 [J].

Kale, S ;

Bhagat, SM ;

Lofland, SE ;

Scabarozi, T ;

Ogale, SB ;

Orozco, A ;

Shinde, SR ;

Venkatesan, T ;

Hannoyer, B ;

Mercey, B ;

Prellier, W .

PHYSICAL REVIEW B, 2001, 64 (20)

[10] Off-axis electron holography observation of magnetic microstructure in a magnetite (001) thin film containing antiphase domains [J].

Kasama, T ;

Dunin-Borkowski, RE ;

Eerenstein, W .

PHYSICAL REVIEW B, 2006, 73 (10)

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