RESEARCH ON SPONTANEOUS MAGNETIZATION IN SOLID BODIES
Abstract
The nuclear magnetic resonance of Co-59 in metallic cobalt powders was examined. In addition to the absorption characteristic of Co-59 in face- centered cubic cobalt, there were found an additional group of absorptions, one of which is clearly associated with hexagonal close packed cobalt. The phenomenon of spin-flopping in antiferromagnetic MnF2, in which the axis of antiferromagnetism is decoupled from the crystaiaxes, was observed by magnetization measurements in high pulsed magnetic fields. Its position coincided with the value, 93 kOe, predicted from measurements of antiferromagnetic resonance with millimeter microwaves. The temperature dependence of the magnetocrystalline anisotropy of face-centered cubic cobalt metal was examined by ferromagnetic resonance on single crystal thin films and submicron precipitate particles in Cu, at temperatures below the range in which this is the stable structure. Satisfactory agreement is obtained for a tenth power law between anisotropy and magnetization. An investigation of magnetic exchange and structure in lanthanum manganite perovskite compounds spanning the transition between antiferromagnetism and ferromagnetism was performed using neutrons diffraction and high field magnetization techniques. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1962
- Accession Number
- AD0277380
Entities
People
- D. S. Rodbell
- I. S. Jacobs
- W. L. Roth
Organizations
- General Electric