High Curie temperature and possible canted magnetism in free Gd clusters

被引：45

作者：

Gerion, D ^{[1
]}

Hirt, A ^{[1
]}

Châtelain, A ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Phys Expt, CH-1015 Lausanne, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.83.532

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The magnetic properties of free Gd-N clusters (N = 13, 21, and 22) have been measured between 90 and 600 K in a Stern-Gerlach experiment. Gd-13 and Gd-21 are found to be superparamagnetic (SP) whereas Gd-22 is not. Within the SP model, the magnetic moment per atom at 100 K is 5.4 mu(B) for Gd-13 and 5 mu(B) for Gd-21, lower than the bulk value, 7.55 mu(B). We measure Curie temperatures of 420 +/- 20 K for Gd-21 and over 500 K for Gd-13, significantly higher than 293 K, the bulk value. A canted magnetic moment model is compatible with the experimental data.

引用

页码：532 / 535

页数：4

共 24 条

[1] Surface-enhanced magnetism in nickel clusters
Apsel, SE
Emmert, JW
Deng, J
Bloomfield, LA
[J]. PHYSICAL REVIEW LETTERS, 1996, 76 (09) : 1441 - 1444
[2] Magnetism of Fe, Co and Ni clusters in molecular beams
Billas, IML
Chatelain, A
deHeer, WA
[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1997, 168 (1-2) : 64 - 84
[3] MONTE-CARLO CALCULATION OF MAGNETIZATION OF SUPERPARAMAGNETIC PARTICLES
BINDER, K
RAUCH, H
WILDPANER, V
[J]. JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1970, 31 (02) : 391 - +
[4] MAGNETIC-PROPERTIES OF FREE COBALT CLUSTERS
BUCHER, JP
DOUGLASS, DC
BLOOMFIELD, LA
[J]. PHYSICAL REVIEW LETTERS, 1991, 66 (23) : 3052 - 3055
[5] CEROVSKI VZ, IN PRESS
[6] SPIN RELAXATION IN SMALL FREE IRON CLUSTERS
DEHEER, WA
MILANI, P
CHATELAIN, A
[J]. PHYSICAL REVIEW LETTERS, 1990, 65 (04) : 488 - 491
[7] MAGNETIC-PROPERTIES OF FREE COBALT AND GADOLINIUM CLUSTERS
DOUGLASS, DC
COX, AJ
BUCHER, JP
BLOOMFIELD, LA
[J]. PHYSICAL REVIEW B, 1993, 47 (19): : 12874 - 12889
[8] MAGIC NUMBERS IN THE MAGNETIC-PROPERTIES OF GADOLINIUM CLUSTERS
DOUGLASS, DC
BUCHER, JP
BLOOMFIELD, LA
[J]. PHYSICAL REVIEW LETTERS, 1992, 68 (11) : 1774 - 1777
[9] DRULIS H, 1991, LANDOLDBORNSTEIN D1, V19
[10] FINITE-SIZE MODIFICATIONS OF THE MAGNETIC-PROPERTIES OF CLUSTERS
HENDRIKSEN, PV
LINDEROTH, S
LINDGARD, PA
[J]. PHYSICAL REVIEW B, 1993, 48 (10): : 7259 - 7273

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