MOSSBAUER MEASUREMENTS OF THE STATIC CRITICAL EXPONENT BETA OF THE LAYERED ANTIFERROMAGNET BA2FEF6

Authors
BRENNAN K HOHENEMSER C EIBSCHUTZ M
Citation
K. Brennan et al., MOSSBAUER MEASUREMENTS OF THE STATIC CRITICAL EXPONENT BETA OF THE LAYERED ANTIFERROMAGNET BA2FEF6, Journal of applied physics, 73(10), 1993, pp. 5500-5502
Citations number
11
Categorie Soggetti
Physics, Applied
Journal title
Journal of applied physics → ACNP
ISSN journal
00218979
Volume
73
Issue
10
Year of publication
1993
Part
2A
Pages
5500 - 5502
Database
ISI
SICI code
0021-8979(1993)73:10<5500:MMOTSC>2.0.ZU;2-B
Abstract
The Mossbauer effect has been used to measure the hyperfine field of F e-57 nuclei in the layered antiferromagnet Ba2FeF6. The temperature de pendence of the sublattice magnetization was measured an order of magn itude closer to the Neel temperature than previous studies. A range of fit analysis to the power law equation h(t) = Bt(beta), yields beta = 0.135(3) and T(N) = 47.96(4) K for 4.31 x 10(-3) < t < 0.7, where t = (1-T/T(N)). This value for beta is substantially closer to the theore tical value (beta = 0.125) than previous work on Ba2FeF6.