Accession Number : ADA133860

Title :   Magnetic Properties of CoCl2-Intercalated Graphite,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE

Personal Author(s) : Elahy,M ; Shayegan,M ; Szeto,K Y ; Dresselhaus,G

PDF Url : ADA133860

Report Date : Apr 1983

Pagination or Media Count : 16

Abstract : The temperature and magnetic field dependence of the magnetic susceptibility and heat capacity of graphite-CoC12 are investigated to understand the role of dimensionality in the observed magnetic phase transitions. The structure of graphite-CoC12 shows similarities between the magnetic layers of Co(+2) in pristine and in the intercalated CoC12 compound. However, microstructural analysis shows the presence of small islands of magnetic ions. The theoretical model for the 2-dimensional planar magnets is extended to include small magnetic domains. The finite size effect analysis shows good agreement between the experimental and theoretical results. The presence of external magnetic fields demonstrates the static scaling hypothesis for the magnetic susceptibility and heat capacity.

Descriptors :   *Magnetic properties, *Graphite, *Cobalt, *Chlorides, Temperature, Magnetic fields, Magnetization, Vulnerability, Specific heat, Phase transformations, Layers, Microstructure, Ions, Models, Two dimensional, Mathematical analysis, Reprints

Subject Categories : Inorganic Chemistry
      Organic Chemistry
      Geology, Geochemistry and Mineralogy
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE