QUANTUM TUNNELING OF MAGNETIZATION IN SINGLE-DOMAIN PARTICLES

被引：20

作者：

TEJADA, J

BALCELLS, LI

LINDEROTH, S

PERZYNSKI, R

RIGAU, B

BARBARA, B

BACRI, JC

机构：

[1] TECH UNIV DENMARK,APPL PHYS LAB,DK-2800 LYNGBY,DENMARK

[2] UNIV PIERRE & MARIE CURIE PARIS 6,F-75252 PARIS 05,FRANCE

[3] LAB MAGNETISM LOUIS NEEL,F-38100 GRENOBLE,FRANCE

来源：

JOURNAL OF APPLIED PHYSICS | 1993年 / 73卷 / 10期

关键词：

D O I：

10.1063/1.352445

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present a study of the magnetic relaxation of several ferrofluids composed of particles of about 40 angstrom in diameter (Fe3O4FeC, CoFe2O4). Our key observation is a nonthermal character of the relaxation below 3 K for the CoFe2O4 ferrofluid and below 1 K for the FeC ferrofluid. The crossover temperature from thermal to nonthermal (quantum) regime is in accordance with theoretical suggestions of macroscopic quantum tunneling of magnetization in single domain particles.

引用

页码：6952 / 6954

页数：3

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