Effect of pressure on the magnetic properties of CrB2
G.E. Grechnev, A.S. Panfilov, and A.V. Fedorchenko
B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Ave., Kharkov 61103, Ukraine
V.B. Filippov and A.B. Lyashchenko
I. Frantsevich Institute for Problems of Material Science, National Academy of Sciences, 3 Krzhyzhanovsky Str., Kiev 03680, Ukraine
Department of Low Temperature Physics and Superconductivity, Physics Faculty, M.V. Lomonosov Moscow State University, Moscow 119899, Russia
Received March 26, 2009
Magnetic susceptibility c of the itinerant antiferromagnet CrB2 with TN ≃ 87K was studied as a function of the hydrostatic pressure up to 2 kbar at fixed temperatures 78 and 300 K. The pressure effect on c is found to be negative in sign and weakly dependent on the magnetic state of the compound. In addition, the measured pressure dependence of the Néel temperature, dTN / dP = (0.1 ± 0.1) K/kbar, is roughly two orders of magnitude smaller than the corresponding value for the pure chromium. The main contributions to c and
their volume dependence are calculated ab initio within the local spin density approximation, and appeared
to be in close agreement with the experimental data.
PACS: 75.50.Ee Antiferromagnetics; PACS: 75.10.Lp Band and itinerant models; PACS: 75.80.+q Magnetomechanical and magnetoelectric effects, magnetostriction.
Ключевые слова: CrB2, high pressure, magnetovolume effect, electronic structure.