Structure and magnetic properties of cobalt nanoplatelets

被引：24

作者：

Li, JG ^{[1
]}

Qin, Y ^{[1
]}

Kou, XL ^{[1
]}

He, HY ^{[1
]}

Song, DK ^{[1
]}

机构：

[1] Lanzhou Univ, Dept Mat Sci, Lanzhou 730000, Peoples R China

来源：

MATERIALS LETTERS | 2004年 / 58卷 / 20期

基金：

中国国家自然科学基金;

关键词：

nanoplatelets; nanomaterials; magnetic materials; microstructure; micromagnetic simulation; reduction process;

D O I：

10.1016/j.matlet.2004.03.026

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Co plate-like nanoparticle (or nanoplatelet) samples with different hcp phase contents were synthesized by a novel reduction process. The thickness-to-diameter aspect ratio of the nanoplatelets is between 1: 10 and 1:50. The normal direction of the nanoplatelets is perpendicular to the close-packed crystallographic planes. The saturation magnetization of the nanoplatelet powders is lower than the corresponding bulk value. The magnetization configuration of the nanoplatelet is a vortex structure without external magnetic field. The coercivities of the nanoplatelets increase with the hcp phase content. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：2506 / 2509

页数：4

共 17 条

[1] MAGNETIC-PROPERTIES OF MICROEMULSION SYNTHESIZED COBALT FINE PARTICLES [J].

CHEN, JP ;

LEE, KM ;

SORENSEN, CM ;

KLABUNDE, KJ ;

HADJIPANAYIS, GC .

JOURNAL OF APPLIED PHYSICS, 1994, 75 (10) :5876-5878

[2] Synthesis and magnetic properties of nickel nanorods [J].

Cordente, N ;

Respaud, M ;

Senocq, F ;

Casanove, MJ ;

Amiens, C ;

Chaudret, B .

NANO LETTERS, 2001, 1 (10) :565-568

[3]

Gates B, 2002, ADV MATER, V14, P1749, DOI 10.1002/1521-4095(20021203)14:23<1749::AID-ADMA1749>3.0.CO

[4]

2-Z

[5] Approach to fabricating Co nanowire arrays with perpendicular anisotropy: Application of a magnetic field during deposition [J].

Ge, SH ;

Li, C ;

Ma, X ;

Li, W ;

Xi, L ;

Li, CX .

JOURNAL OF APPLIED PHYSICS, 2001, 90 (01) :509-511

[6] SYNTHESIS AND CHARACTERIZATION OF ANISOMETRIC COBALT NANOCLUSTERS [J].

GIBSON, CP ;

PUTZER, KJ .

SCIENCE, 1995, 267 (5202) :1338-1340

[7] Reorientational magnetic transition in mesoscopic cobalt dots [J].

Hehn, M ;

Ounadjela, K ;

Ferre, R ;

Grange, W ;

Rousseaux, F .

APPLIED PHYSICS LETTERS, 1997, 71 (19) :2833-2835

[8] Arrays of epitaxial Co submicron particles:: Critical size for single-domain formation and multidomain structures [J].

Kazakova, O ;

Hanson, M ;

Blomquist, P ;

Wäppling, R .

JOURNAL OF APPLIED PHYSICS, 2001, 90 (05) :2440-2446

[9] THEORY OF THE STRUCTURE OF FERROMAGNETIC DOMAINS IN FILMS AND SMALL PARTICLES [J].

KITTEL, C .

PHYSICAL REVIEW, 1946, 70 (11-1) :965-971

[10]

Kumar RV, 2001, J APPL PHYS, V89, P6324, DOI 10.1063/1.1369408

← 1 2 →