MAGNETIZATION CHANGES WITH MODULATION PERIOD IN FE3O4/NIO SUPERLATTICES

被引：25
|
作者：
BERRY, SD [1 ]
LIND, DM [1 ]
CHERN, G [1 ]
MATHIAS, H [1 ]
机构：
[1] FLORIDA STATE UNIV,CTR MAT RES & TECHNOL,TALLAHASSEE,FL 32306
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1993年 / 123卷 / 1-2期
关键词：
D O I：
10.1016/0304-8853(93)90021-S
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have magnetically characterized single crystal Fe3O4/NiO superlattices grown on MgO(001), where the layer thickness has been varied over a wide range. Hysteresis for modulation wavelength LAMBDA(mod) = 258 angstrom is similar to bulk Fe3O4, while loops for LAMBDA(mod) < 80 angstrom are nearly linear with applied field with minimal hysteresis and remanence. The magnetization slopes of the latter are roughly proportional to LAMBDA(mod), and increase from 5 to 300 K. MeasurementS above 300 K suggest that both exchange coupling across NiO/Fe3O4 interfaces and strain-induced variations in anisotropy, rather than paramagnetism, lead to this linear behavior.
引用
收藏
页码：126 / 132
页数：7
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