Multiply twinned morphologies of FePt and CoPt nanoparticles

被引：132

作者：

Gruner, Markus E. ^{[1
]}

Rollmann, Georg

Entel, Peter

Farle, Michael

机构：

[1] Univ Duisburg Essen, Dept Phys, D-47048 Duisburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.100.087203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Based on large-scale density functional theory calculations we provide a systematic overview of the size dependence of the energetic order and magnetic properties of various morphologies of FePt and CoPt clusters with diameters of up to 2.5 nm. For FePt, ordered multiply twinned icosahedra and decahedra are more favorable than the L1(0) phase throughout the investigated size range. For CoPt, segregated morphologies predominate with considerably increased energy differences to the L1(0) structure. The compositional trends are traced back to differences between the morphologies in the partial electronic density of states associated with the 3d element.

引用

页数：4

共 36 条

[1] Electronic and atomic structure, and magnetism of transition-metal clusters [J].

Alonso, JA .

CHEMICAL REVIEWS, 2000, 100 (02) :637-677

[2] Enhanced orbital magnetism in Fe50Pt50 nanoparticles [J].

Antoniak, C. ;

Lindner, J. ;

Spasova, M. ;

Sudfeld, D. ;

Acet, M. ;

Farle, M. ;

Fauth, K. ;

Wiedwald, U. ;

Boyen, H. -G. ;

Ziemann, P. ;

Wilhelm, F. ;

Rogalev, A. ;

Sun, Shouheng .

PHYSICAL REVIEW LETTERS, 2006, 97 (11)

[3] Structural properties of nanoclusters: Energetic, thermodynamic, and kinetic effects [J].

Baletto, F ;

Ferrando, R .

REVIEWS OF MODERN PHYSICS, 2005, 77 (01) :371-423

[4] MAGNETISM FROM THE ATOM TO THE BULK IN IRON, COBALT, AND NICKEL CLUSTERS [J].

BILLAS, IML ;

CHATELAIN, A ;

DEHEER, WA .

SCIENCE, 1994, 265 (5179) :1682-1684

[5] Electronic and magnetic properties of ligand-free FePt nanoparticles [J].

Boyen, HG ;

Fauth, K ;

Stahl, B ;

Ziemann, P ;

Kästle, G ;

Weigl, F ;

Banhart, F ;

Hessler, M ;

Schütz, G ;

Gajbhiye, NS ;

Ellrich, J ;

Hahn, H ;

Büttner, M ;

Garnier, MG ;

Oelhafen, P .

ADVANCED MATERIALS, 2005, 17 (05) :574-+

[6] Competition between ferromagnetism and antiferromagnetism in FePt [J].

Brown, G ;

Kraczek, B ;

Janotti, A ;

Schulthess, TC ;

Stocks, GM ;

Johnson, DD .

PHYSICAL REVIEW B, 2003, 68 (05)

[7] Shapes, multiple twins and surface structures of monodisperse FePt magnetic nanocrystals [J].

Dai, ZR ;

Sun, SH ;

Wang, ZL .

SURFACE SCIENCE, 2002, 505 (1-3) :325-335

[8] Ion beam induced destabilization of icosahedral structures in gas phase prepared FePt nanoparticles -: art. no. 10N112 [J].

Dmitrieva, O ;

Rellinghaus, B ;

Kästner, J ;

Liedke, MO ;

Fassbender, J .

JOURNAL OF APPLIED PHYSICS, 2005, 97 (10)

[9] Entropic effects on the size dependence of cluster structure [J].

Doye, JPK ;

Calvo, F .

PHYSICAL REVIEW LETTERS, 2001, 86 (16) :3570-3573

[10] Magnetic properties of Co- and FePt-clusters [J].

Ebert, H ;

Bornemann, S ;

Minár, J ;

Dederichs, PH ;

Zeller, R ;

Cabria, I .

COMPUTATIONAL MATERIALS SCIENCE, 2006, 35 (03) :279-282

← 1 2 3 4 →