Magnetic susceptibility and specific heat of the semi-magnetic semiconductors Cd1-xFexSe and Hg1-xFexSe and their mixtures

1987 ◽  
Vol 20 (13) ◽  
pp. 2005-2017 ◽  
Author(s):  
A Lewicki ◽  
J Spalek ◽  
A Mycielski
2005 ◽  
Vol 72 (2) ◽  
Author(s):  
R. Lortz ◽  
Y. Wang ◽  
S. Abe ◽  
C. Meingast ◽  
Yu. B. Paderno ◽  
...  

Thermodynamic measurements have been made at temperatures below 1°K, obtained by the method of magnetic cooling, on copper potassium sulphate and on a diluted copper Tutton salt. A study has been made of the field- dependence (for small fields) of the adiabatic susceptibility of the cooled and thermally isolated salt, the measurements covering the range of temperature from 1°K down to 0.05°K for copper potassium sulphate, and to 0.025° K for the dilute salt. From these measurements the entropy and magnetic susceptibility are determined as functions of the absolute temperature. It is concluded that for both salts the susceptibility follows a Curie-Weiss law, the values of ∆ being 0.034 and 0.0048º K respectively; the specific heats are of the form ∆ / T 2 , the values found for A being 6.1x10 -4 R for copper potassium sulphate and 1.98x10 -4 R for the dilute salt.Deviations from this behaviour in a ferromagnetic direction are found for copper potassium sulphate below 0.07° K.


1974 ◽  
Vol 14 (10) ◽  
pp. x
Author(s):  
M. Coldea ◽  
M. Crisan ◽  
A. Néda ◽  
Iuliu Pop

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