McClintock, Peter V. E. and Rosenberg, H. M. (1965) The thermal conductivity of paramagnetic crystals in a magnetic field at low temperatures. Bulletin de l'Institute du Froid (Supplement). pp. 107-115.Full text not available from this repository.
The thermal conductivities of KMgF3 crystals doped with Ni2+ and Co2+ and crystals of cerium ethylsulphate have been measured in the temperature range 1 to 4.2 K and in magnetic fields up to 52 kilogauss. In all cases the conductivity changes which are observed may be qualitatively interpreted as being due to bands of phonons within a certain energy range being scattered by interaction with the spin system, the energy range being changed as the magnetic field is varied. For the Co2+ doping it is possible that interaction with pairs of Co ions is being observed, rather than with single ions. For the Ni2+ ions and the Co2+ pairs it would appear that in zero field the ground state doublet is separated from a higher singlet with a separation which has a spread of about 3 /cm. Cerium ethylsulphate has two low lying doublets whose g values are very different parallel and perpendicular to the hexagonal axis. The conductivity behaviour of crystals cut along these two axes is therefore quite different and this is briefly discussed.
|Journal or Publication Title:||Bulletin de l'Institute du Froid (Supplement)|
|Additional Information:||Proceedings of the conference in Grenoble, 1965.|
|Subjects:||Q Science > QC Physics|
|Departments:||Faculty of Science and Technology > Physics|
|Deposited By:||Professor P. V. E. McClintock|
|Deposited On:||13 Apr 2010 08:55|
|Last Modified:||26 Jul 2012 17:13|
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