Anomalous magnetic properties of Fe3O4 nanostructures on GaAs substrate probed using X-ray magnetic circular dichroism

被引：11

作者：

Phase, D. M. ^{[1
]}

Panchal, Gyanendra ^{[1
]}

Rawat, Ritu ^{[1
]}

Tiwari, Shailja ^{[1
,2
]}

Prakash, Ram ^{[1
,3
]}

Jain, Deepti ^{[1
,4
]}

Choudhary, R. J. ^{[1
]}

机构：

[1] UGC DAE Consortium Sci Res, Khandwa Rd,Univ Campus, Indore 452001, Madhya Pradesh, India

[2] Govt Women Engn Coll, Ajmer, India

[3] Shri Mata Vaishno Devi Univ, Katra, India

[4] Govt KRG Girls Degree Coll, Gwalior, India

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2019年 / 482卷

关键词：

VERWEY TRANSITION; FILMS; NANOPARTICLES; SPECTROSCOPY; IRON; FE;

D O I：

10.1016/j.jmmm.2019.03.041

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the magnetic properties and electronic structure of 2 nm Fe3O4 film on GaAs substrates, which evolve in a nano-tip structure and compared it with 150 nm thick Fe3O4 film. Valence band studies reveal a drop in density of states at Fermi level for 2 nm film as compared to thicker film. XMCD studies divulge the unusual high magnetization value of similar to 5.1 mu(B)/FU in 2 nm film compared to 3.9 mu(B)/FU observed for bulk Fe3O4 or thicker Fe3O4 films. The excess moment is shown to be due to orbital moment contribution.

引用

页码：296 / 300

页数：5

共 37 条

[1] Spontaneous ordering of oxide nanostructures [J].

Aggarwal, S ;

Monga, AP ;

Perusse, SR ;

Ramesh, R ;

Ballarotto, V ;

Williams, ED ;

Chalamala, BR ;

Wei, Y ;

Reuss, RH .

SCIENCE, 2000, 287 (5461) :2235-2237

[2] Magnetite nano-islands on silicon-carbide with graphene [J].

Anderson, Nathaniel A. ;

Zhang, Qiang ;

Hupalo, Myron ;

Rosenberg, Richard A. ;

Tringides, Michael C. ;

Vaknin, David .

JOURNAL OF APPLIED PHYSICS, 2017, 121 (01)

[3] HIGH-RESOLUTION PHOTOEMISSION SPECTROSCOPY OF THE VERWEY TRANSITION IN FE3O4 [J].

CHAINANI, A ;

YOKOYA, T ;

MORIMOTO, T ;

TAKAHASHI, T ;

TODO, S .

PHYSICAL REVIEW B, 1995, 51 (24) :17976-17979

[4] EXPERIMENTAL CONFIRMATION OF THE X-RAY MAGNETIC CIRCULAR-DICHROISM SUM-RULES FOR IRON AND COBALT [J].

CHEN, CT ;

IDZERDA, YU ;

LIN, HJ ;

SMITH, NV ;

MEIGS, G ;

CHABAN, E ;

HO, GH ;

PELLEGRIN, E ;

SETTE, F .

PHYSICAL REVIEW LETTERS, 1995, 75 (01) :152-155

[5]

Chopra K L, 1969, THIN FILM PHENOMENA, P844

[6] Magnetotransport, noise, and x-ray magnetic circular dichroism studies of pulsed laser deposited Fe3O4 film on Si substrates [J].

Choudhary, R. J. ;

Tiwari, Shailja ;

Phase, D. M. ;

Kumar, Ravi ;

Thakur, P. ;

Chae, K. H. ;

Choi, W. K. .

APPLIED PHYSICS LETTERS, 2008, 92 (07)

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

Eerenstein, W ;

Palstra, TTM ;

Saxena, SS ;

Hibma, T .

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

[8] In situ XPS analysis of various iron oxide films grown by NO2-assisted molecular-beam epitaxy [J].

Fujii, T ;

de Groot, FMF ;

Sawatzky, GA ;

Voogt, FC ;

Hibma, T ;

Okada, K .

PHYSICAL REVIEW B, 1999, 59 (04) :3195-3202

[9] PREPARATION AND CHARACTERIZATION OF (111)-ORIENTED FE3O4 FILMS DEPOSITED ON SAPPHIRE [J].

FUJII, T ;

TAKANO, M ;

KATANO, R ;

BANDO, Y ;

ISOZUMI, Y .

JOURNAL OF APPLIED PHYSICS, 1989, 66 (07) :3168-3172

[10] Absorption spectroscopy and XMCD at the Verwey transition of Fe3O4 [J].

Goering, E. J. ;

Lafkioti, M. ;

Gold, S. ;

Schuetz, G. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2007, 310 (02) :E249-E251

← 1 2 3 4 →