Particle moment canting in CoFe2O4 nanoparticles

被引：30

作者：

Hasz, K. ^{[1
]}

Ijiri, Y. ^{[1
]}

Krycka, K. L. ^{[2
]}

Borchers, J. A. ^{[2
]}

Booth, R. A. ^{[3
]}

Oberdick, S. ^{[3
]}

Majetich, S. A. ^{[3
]}

机构：

[1] Oberlin Coll, Dept Phys & Astron, Oberlin, OH 44074 USA

[2] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[3] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA

来源：

PHYSICAL REVIEW B | 2014年 / 90卷 / 18期

基金：

美国国家科学基金会;

关键词：

ANISOTROPY; MAGNETISM; SPIN;

D O I：

10.1103/PhysRevB.90.180405

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polarization-analyzed small-angle neutron scattering methods are used to determine the spin morphology in high crystalline anisotropy, 11 nm diameter CoFe2O4 nanoparticle assemblies with randomly oriented easy axes. In moderate to high magnetic fields, the nanoparticles adopt a uniformly canted structure, rather than forming domains, shells, or other arrangements. The observed canting angles agree quantitatively with those predicted from an energy model dominated by Zeeman and anisotropy competition, with implications for the technological use of such nanoparticles.

引用

页数：5

共 21 条

[1]

Amiri S, 2013, Mater Sci Eng C Mater Biol Appl, V33, P1, DOI 10.1016/j.msec.2012.09.003

[2] Advances in Magnetic Data Storage Technologies [J].

Bandic, Zvonimir Z. ;

Victora, Randall H. .

PROCEEDINGS OF THE IEEE, 2008, 96 (11) :1749-1753

[3] Small angle neutron scattering study of disordered and crystalline iron nanoparticle assemblies [J].

Farrell, D. F. ;

Ijiri, Y. ;

Kelly, C. V. ;

Borchers, J. A. ;

Rhyne, J. J. ;

Ding, Y. ;

Majetich, S. A. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2006, 303 (02) :318-322

[4] Surface contribution to the anisotropy of magnetic nanoparticles [J].

Garanin, DA ;

Kachkachi, H .

PHYSICAL REVIEW LETTERS, 2003, 90 (06) :4

[5] Longitudinal polarization analysis in small-angle neutron scattering [J].

Honecker, D. ;

Ferdinand, A. ;

Doebrich, F. ;

Dewhurst, C. D. ;

Wiedenmann, A. ;

Gomez-Polo, C. ;

Suzuki, K. ;

Michels, A. .

EUROPEAN PHYSICAL JOURNAL B, 2010, 76 (02) :209-213

[6] Reduction and analysis of SANS and USANS data using IGOR Pro [J].

Kline, Steven R. .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 2006, 39 :895-900

[7] Surface spin disorder in NiFe2O4 nanoparticles [J].

Kodama, RH ;

Berkowitz, AE ;

McNiff, EJ ;

Foner, S .

PHYSICAL REVIEW LETTERS, 1996, 77 (02) :394-397

[8] Biomedical Nanomagnetics: A Spin Through Possibilities in Imaging, Diagnostics, and Therapy [J].

Krishnan, Kannan M. .

IEEE TRANSACTIONS ON MAGNETICS, 2010, 46 (07) :2523-2558

[9] Origin of Surface Canting within Fe3O4 Nanoparticles [J].

Krycka, K. L. ;

Borchers, J. A. ;

Booth, R. A. ;

Ijiri, Y. ;

Hasz, K. ;

Rhyne, J. J. ;

Majetich, S. A. .

PHYSICAL REVIEW LETTERS, 2014, 113 (14)

[10] Core-Shell Magnetic Morphology of Structurally Uniform Magnetite Nanoparticles [J].

Krycka, K. L. ;

Booth, R. A. ;

Hogg, C. R. ;

Ijiri, Y. ;

Borchers, J. A. ;

Chen, W. C. ;

Watson, S. M. ;

Laver, M. ;

Gentile, T. R. ;

Dedon, L. R. ;

Harris, S. ;

Rhyne, J. J. ;

Majetich, S. A. .

PHYSICAL REVIEW LETTERS, 2010, 104 (20)

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