DETERMINATION OF THE CRITICAL EXPONENT-BETA FROM MEASUREMENTS OF A WEAK SPONTANEOUS MAGNETIZATION IN THE 3D ISING ANTIFERROMAGNET FEF2
1994 (English)In: Journal of Magnetism and Magnetic Materials, ISSN 0304-8853, Vol. 136Article in journal (Refereed) Published
The critical exponent for the order parameter, beta, has been determined from the temperature dependence of a weak spontaneous magnetisation that appears below the Neel temperature in the prototypical 3d Ising antiferromagnet FeF2. The derived value of beta = 0.325 +/- 0.002 agrees with the theoretically calculated value for beta of a 3d Ising system. The very occurrence of a spontaneous magnetisation in pure FeF2 is assumed to be of piezomagnetic origin.
Place, publisher, year, edition, pages
1994. Vol. 136
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:uu:diva-195520DOI: 10.1016/0304-8853(94)90440-5OAI: oai:DiVA.org:uu-195520DiVA: diva2:607979