Origin of shape anisotropy effects in solution-phase synthesized FePt nanomagnets

被引：11

作者：

Ferrer, D. A. ^{[1
]}

Guchhait, S. ^{[1
]}

Liu, H. ^{[1
]}

Ferdousi, F. ^{[1
]}

Corbet, C. ^{[1
]}

Xu, H. ^{[1
]}

Doczy, M. ^{[2
]}

Bourianoff, G. ^{[2
]}

Mathew, L. ^{[3
]}

Rao, R. ^{[3
]}

Saha, S. ^{[1
]}

Ramon, M. ^{[1
]}

Ganguly, S. ^{[4
]}

Markert, J. T. ^{[5
]}

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

机构：

[1] Univ Texas Austin, Microelect Res Ctr, Austin, TX 78758 USA

[2] Intel Corp, Hillsboro, OR 97124 USA

[3] Astrowatt Inc, Austin, TX 78758 USA

[4] Indian Inst Technol, Dept Elect Engn, Bombay 400076, Maharashtra, India

[5] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2011年 / 110卷 / 01期

关键词：

NANOPARTICLES;

D O I：

10.1063/1.3608109

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Controlling the morphology of inorganic nanocrystals is important because many of their electronic attributes are highly sensitive to shape and aspect ratio. FePt nanocrystals have potential as advanced magnetic materials for ultrahigh-density memory. This is due to their high shape and/or magnetocrystalline anisotropy, which allows bits as small as 3 nm to be thermally stable over typical data storage periods of 10 years. Herein, nanocrystals were simply fabricated by simultaneous reduction of platinum acetylacetonate and thermal decomposition of iron pentacarbonyl in properly chosen conditions of solvent/surfactant proportions and temperature for rational design of their shape and magnetic properties. This work has combined magnetometry measurements and micromagnetic simulations to illustrate the role of the external shape on the rotation of the magnetization vector for colloidal assemblies. (C) 2011 American Institute of Physics. [doi:10.1063/1.3608109]

引用

页数：7

共 22 条

[1]

Alloyeau D, 2009, NAT MATER, V8, P940, DOI [10.1038/NMAT2574, 10.1038/nmat2574]

[2] Spintronics [J].

Bader, S. D. ;

Parkin, S. S. P. .

ANNUAL REVIEW OF CONDENSED MATTER PHYSICS, VOL 1, 2010, 1 :71-88

[3] Silver nanoparticles capped by oleylamine: Formation, growth, and self-organization [J].

Chen, Meng ;

Feng, Yong-Gang ;

Wang, Xia ;

Li, Ting-Cheng ;

Zhang, Jun-Yan ;

Qian, Dong-Jin .

LANGMUIR, 2007, 23 (10) :5296-5304

[4] Synthesis of FePt nanocubes and their oriented self-assembly [J].

Chen, Min ;

Kim, Jaemin ;

Liu, J. P. ;

Fan, Hongyou ;

Sun, Shouheng .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (22) :7132-7133

[5] Large-scale ab initio simulations of binary transition metal clusters for storage media materials [J].

Entel, P. ;

Gruner, M. E. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2009, 21 (06)

[6] Tailoring magnetic vortices in nanostructures [J].

Garcia, F. ;

Westfahl, H. ;

Schoenmaker, J. ;

Carvalho, E. J. ;

Santos, A. D. ;

Pojar, M. ;

Seabra, A. C. ;

Belkhou, R. ;

Bendounan, A. ;

Novais, E. R. P. ;

Guimaraes, A. P. .

APPLIED PHYSICS LETTERS, 2010, 97 (02)

[7]

Getzlaff Mathias., 2007, Fundamentals of magnetism

[8] Observation of L10-like chemical ordering in a decahedral FePt nanoparticle by Cs-corrected high resolution transmission electron microscopy [J].

Hu, Xuerang ;

Xie, Lin ;

Zhu, Jing ;

Poudyal, Narayan ;

Liu, J. Ping ;

Yuan, Jun .

JOURNAL OF APPLIED PHYSICS, 2009, 105 (07)

[9] Magnetostatic control of vortex chirality in Co thin film rings [J].

Nam, Chunghee ;

Mascaro, M. D. ;

Ross, C. A. .

APPLIED PHYSICS LETTERS, 2010, 97 (01)

[10] Configurational stability of patterned magnetic nanosystems [J].

Pardavi-Horvath, M. ;

Si, P. E. ;

Ross, C. A. ;

Castano, F. J. ;

Ng, B. G. ;

Moralejo, S. .

JOURNAL OF APPLIED PHYSICS, 2008, 103 (07)

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