Journal article
Critical Properties of Pure and Random Antiferromagnets: CoF2, Co/ZnF2, KMn/ NiF3
Neutron scattering techniques have been used to study the critical properties of CoF2 and the randomly mixed systems: Co/ZnF2 and KMn/NiF3. The results for CoF2 are in excellent accord with the critical properties of the three-dimensional Ising model. In all of the random crystals studied the transition was smeared.
In CoF2 the smearing corresponds to concentration fluctuations of about 1.5% while in KMn/NiF3 it corresponds to about 2.5%. In both cases macroscopic chemical inhomogeneities were observed in these systems by electron microprobe analysis of a magnitude consistent with the observed smearing. Despite and smearing, measurements were made of the critical properties of Co/ZnF2.
The results are insufficiently accurate to clearly distinguish between the properties of the pure three-dimensional Ising model and of the random system.
Language: | English |
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Year: | 1980 |
Pages: | 3281-3291 |
ISSN: | 17473802 and 00223719 |
Types: | Journal article |
DOI: | 10.1088/0022-3719/13/17/018 |