Superparamagnetic behavior of structural domains in epitaxial ultrathin magnetite films

被引：199

作者：

Voogt, FC ^{[1
]}

Palstra, TTM ^{[1
]}

Niesen, L ^{[1
]}

Rogojanu, OC ^{[1
]}

James, MA ^{[1
]}

Hibma, T ^{[1
]}

机构：

[1] Univ Groningen, Ctr Mat Sci, NL-9747 AG Groningen, Netherlands

来源：

PHYSICAL REVIEW B | 1998年 / 57卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.57.R8107

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We provide evidence that thin films of magnetite Fe3O4 epitaxially grown on single-crystalline MgO(100), form domains with unique magnetic properties. Strong 180 degrees Fe-O-Fe superexchange paths at antiphase domain boundaries result in a frustration of the interdomain interactions. Probe-layer Mossbauer spectroscopy shows superparamagnetic behavior in the entire film, in spite of the nearly perfect layer-by-layer growth. Superconducting quantum interference device magnetometry is used to determine the temperature and thickness dependence of the superparamagnetic blocking temperatures.

引用

页码：R8107 / R8110

页数：4

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