Electronic Resource
Springer
Hyperfine interactions
96 (1995), S. 51-62
ISSN:
1572-9540
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Measurements of the57Fe Mössbauer effect and of the magnetic susceptibilities on a single crystal have been performed on the quasi-1-d antiferromagnetic chain of (NH4)2Mn0.98Fe0.02F5 as a function of temperature. Particular attention was paid to the region very near the Néel point. The Mössbauer spectra fitted by the Blume-Tjon model show definite relaxation effects, which are attributed to short-range order with temperature-dependent relaxation times. The soliton model of nonlinear excitations was applied. Experimental data confirm the predicted exponential temperature dependence of the thermal excitation of moving domain walls. From the activation energy a local anisotropy energyD/k of −3.9 K was derived.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02066271
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