MAGNETIC-PROPERTIES OF A MN CLUSTER ORGANIC-COMPOUND

被引：82

作者：

NOVAK, MA ^{[1
]}

SESSOLI, R ^{[1
]}

CANESCHI, A ^{[1
]}

GATTESCHI, D ^{[1
]}

机构：

[1] UNIV FLORENCE,DEPT CHEM,I-50144 FLORENCE,ITALY

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1995年 / 146卷 / 1-2期

关键词：

D O I：

10.1016/0304-8853(94)00860-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We describe unusual magnetic properties of a 12 Mn cluster organic compound that has a S = 10 ground state and a very high anisotropy. Ac susceptibility and magnetization measurements on powder samples show a superparamagnetic like behavior, with relaxation times following tau = tau(0) exp(Delta/T), where tau(0) similar to 10(-7) s. Field cooled and zero field cooled magnetization curves split below 3 K, with onset of hysteresis. Low temperature specific heat measurements show no anomaly down to 1.6 K. The isolated and well-defined dusters form an excellent model system for magnetic relaxation studies and possible quantum tunneling effects at very low temperatures.

引用

页码：211 / 213

页数：3

共 5 条

[1] MACROSCOPIC QUANTUM EFFECTS IN NANOMETER-SCALE MAGNETS [J].