Magnetic properties, relaxation, and quantum tunneling in CoFe2O4 nanoparticles embedded in potassium silicate

被引：78

作者：

Zhang, XX ^{[1
]}

Hernandez, JM ^{[1
]}

Tejada, J ^{[1
]}

Ziolo, RF ^{[1
]}

机构：

[1] XEROX CORP,WILSON CTR RES & TECHNOL,WEBSTER,NY 14580

来源：

PHYSICAL REVIEW B | 1996年 / 54卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.54.4101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report magnetic properties and magnetic relaxation phenomena in a sample comprised of nanocrystalline CoFe2O4 (similar to 97%)+gamma-Fe2O3(similar to 3%) and polymer in potassium silicate (as magnetic glass) nanoparticle systems in which two very different barrier distributions contributed to the relaxation behavior. We have demonstrated experimentally that only energy barrier distributions and the thermal activation process could not account for a plateau in the viscosity data at low temperatures. Quantum tunneling of magnetization is suggested below similar to 3 K.

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页码：4101 / 4106

页数：6

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