SMALL-ANGLE NEUTRON-SCATTERING OF NANOMETER-SIZE MAGNETIC PARTICLES

被引：17

作者：

CHILDRESS, JR

CHIEN, CL

RHYNE, JJ

ERWIN, RW

机构：

[1] NIST,DIV REACTOR,GAITHERSBURG,MD 20899

[2] UNIV MISSOURI,RES REACTOR,COLUMBIA,MO 65211

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1992年 / 104卷

关键词：

D O I：

10.1016/0304-8853(92)91464-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanoscale Fe particles in an Al2O3 matrix have been investigated by Small-Angle Neutron Scattering (SANS), in addition to SQUID magnetometry and Mossbauer spectroscopy. SANS data analysis indicates an increase of the ferromagnetic correlation length as the temperature decreases, with saturation at roughly the particle size. The amplitude of this scattering decreases with temperature, indicating that it is likely dynamic in origin. There is a second component of the SANS at the smallest wavevector transfers, which we believe arises from inter-particle correlations. The amplitude of this component increases with decreasing temperature, as expected for order parameter scattering.

引用

页码：1585 / 1586

页数：2