ISSN:
1573-7357
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
AC measurements at 21 Hz of the magnetic susceptibility of powdered cerium magnesium nitrate between 4.2 and 1.1 K are reported together with the dependence of this susceptibility on the magnitude of the measuring magnetic field. It is found that, below 2 K, there is an appreciable field dependence, and observable departures from Curie's law occur if measuring fields greater than 3 O rms are used: this result is of particular relevance in magnetic thermometry. The authors attribute this field dependence to a spin-lattice relaxation effect and they give a theory for the field dependence of the magnetic susceptibility in which account is taken both of the various orientations of the individual crystallites forming the sample and also of the fact that, in ac measurements, the Fourier component of M/H at the measuring frequency is detected rather than the differential susceptibility ∂M/∂H.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00121727
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