Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1804265 | Journal of Magnetism and Magnetic Materials | 2007 | 5 Pages |
Abstract
The thermal expansion α has been measured for single-crystalline HoNi2B2C in the range between 2 and 200K. At low temperatures, α is dominated by magnetic contributions leading to a strongly anisotropic behaviour with different signs for the expansion coefficients near the antiferromagnetic phase transition. Analysing the magnetic and lattice contributions of α well above this temperature, a nearly isotropic behaviour of the latter one can be deduced. Using the Ehrenfest relation, a relatively weak pressure dependence of the superconducting transition temperature of dTc/dp=0.1K/GPa was determined for pressure applied along the c direction which points to a rather small pressure-induced lattice stiffening. The ratio between expansion coefficient and specific-heat features large values at the onset of magnetic order.
Keywords
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Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
M. Schneider, A. Gladun, A. Kreyssig, J. Wosnitza, D. Souptel, G. Behr,