ISSN:
1434-601X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The Mössbauer resonance of the 21.6 keV transition in151Eu has been used to investigate the magnetic properties of divalent ionic europium compounds at ultra low temperatures. The specimens were cooled by a3He/4He dilution refrigerator to a minimum temperature of 0.04 K. The following magnetic ordering temperatures were found: EuSO4, 0.43 K; EuF2, 1.0 K; EuCO3, 1.05 K; EuCl2, 1.1 K; EuC2O4, 1.9 K; EuC2O4 · H2O, 2.8 K. The absolute value of the saturation hyperfine fieldH eff of all these compounds is between 315 and 337 kOe. The temperature dependence ofH eff deviates somewhat from aS=7/2 Brillouin function. This behavior is probably due to relaxation phenomena.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01403173