Magnetic properties of Co nanoparticle granular films capped with Pt

被引：19

作者：

Bartolome, J. ^{[1
]}

Garcia, L. M.

Bartolome, F.

Luis, F.

Petroff, F.

Deranlot, C.

Wilhelm, F.

Rogalev, A.

机构：

[1] Univ Zaragoza, CSIC, Dept Fis Mat Condensada, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain

[2] Unite Mixte Phys CNRS Thales, F-91767 Palaiseau, France

[3] Univ Paris 11, F-91405 Orsay, France

[4] European Synchrotron Radiat Facil, F-38043 Grenoble, France

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 316卷 / 02期

关键词：

Co granular multilayers; Pt capping;

D O I：

10.1016/j.jmmm.2007.02.060

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetization and susceptibility measurements have been performed on Co granular (Al2O3/Co/Pt)(25) multilayers. A cusp-like anomaly is present in the susceptibility, which together with magnetization measurements suggests that the samples behave as an amorphous Correlated-Super-Spin system. The presence of CoPt partial alloying is proven by the XANES spectra. The XMCD spectra show that the interfacial Pt atoms become magnetically polarized by hybridization of the Pt 5d and Co 3d electrons, and are ferromagnetically coupled to the Co particle moments. The Pt layer is effective in transmitting interparticle exchange coupling. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：E9 / E12

页数：4

共 15 条

[1] Induced ferromagnetism and anisotropy of Pt layers in Fe/Pt(001) multilayers [J].

Antel, WJ ;

Schwickert, MM ;

Lin, T ;

O'Brien, WL ;

Harp, GR .

PHYSICAL REVIEW B, 1999, 60 (18) :12933-12940

[2] Capping layer effects in the structure and composition of Co nanoparticle ultrathin films -: art. no. 032510 [J].

Arbiol, J ;

Peiró, F ;

Cornet, A ;

Clavero, C ;

Cebollada, A ;

Armelles, G ;

Huttel, Y .

APPLIED PHYSICS LETTERS, 2005, 86 (03) :1-3

[3] XMCD study of the anisotropy of nanometric Co clusters in insulating and metallic matrices [J].

Bartolome, F. ;

Luis, F. ;

Petroff, F. ;

Garcia, L. M. ;

Bartolome, J. ;

Cros, V. ;

Jaffres, H. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2004, 272 :E1275-E1276

[4]

Bartolomé J, 2005, PHYS MET METALLOGR+, V99, pS8

[5] ORDERING IN FERROMAGNETS WITH RANDOM ANISOTROPY [J].

CHUDNOVSKY, EM ;

SASLOW, WM ;

SEROTA, RA .

PHYSICAL REVIEW B, 1986, 33 (01) :251-261

[6] MAGNETIC-ANISOTROPY OF MULTILAYERS [J].

DENBROEDER, FJA ;

HOVING, W ;

BLOEMEN, PJH .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1991, 93 :562-570

[7] Pt magnetization profile in a Pt/Co bilayer studied by resonant magnetic x-ray reflectometry -: art. no. 020405 [J].

Geissler, J ;

Goering, E ;

Justen, M ;

Weigand, F ;

Schütz, G ;

Langer, J ;

Schmitz, D ;

Maletta, H ;

Mattheis, R .

PHYSICAL REVIEW B, 2002, 65 (02) :1-4

[8] Magnetocrystalline anisotropy in (111) CoPt3 thin films probed by x-ray magnetic circular dichroism [J].

Grange, W ;

Maret, M ;

Kappler, JP ;

Vogel, J ;

Fontaine, A ;

Petroff, F ;

Krill, G ;

Rogalev, A ;

Goulon, J ;

Finazzi, M ;

Brookes, NB .

PHYSICAL REVIEW B, 1998, 58 (10) :6298-6304

[9] Electronic structure of Co-Pt alloys: X-ray spectroscopy and density-functional calculations [J].

Lee, YS ;

Rhee, JY ;

Whang, CN ;

Lee, YP .

PHYSICAL REVIEW B, 2003, 68 (23)

[10] Enhancement of the magnetic anisotropy of Co clusters by Au capping [J].

Luis, F. ;

Bartolome, J. ;

Bartolome, F. ;

Martinez, M. J. ;

Garcia, L. M. ;

Petroff, F. ;

Deranlot, C. ;

Wilhelm, F. ;

Rogalev, A. .

JOURNAL OF APPLIED PHYSICS, 2006, 99 (08)

← 1 2 →