[figure: 9.7 cm]

Examination of high field magnetostriction peculiarities in anisotropic superconductors.

V.V. Eremenko^{a}, \underline{N.I. Makedonska^{a}}, V.A. Sirenko^{a}, R. Schleser^{b} aInstitute for Low Temperature Physics and Engineering, 61103 Kharkov, Ukraine

bGrenoble High Magnetic Field Laboratory, MPI-FKF and CNRS BP-166, F-38042, Grenoble Cedex 09, France

The high field features of magnetostriction in anisotropic superconducting compounds of transition metals (e.g. 2H-NbSe_{2}, YBaCuO, etc.) in the mixed state were investigated. The sharp (for an order of magnitude) increase of magnetostriction in high magnetic fields is examined. The coupling of the observed phenomena with transitions in the array of magnetic vortices is analyzed. For that the monotonic equilibrium component of magnetostriction and irreversible one are separated. The temperature dependences of position and shape of the magnetostriction maxima in increasing and descending fields are analyzed by means of solution of multiextremum problem and probability approximation. Possibility of antiferromagnetic contribution to the observations is discussed.

[figure: 13.4 cm]

Subject category :

5. Phase Transitions and Critical Phenomena

Presentation mode : poster

Corresponding author : N.I. Makedonska

Address for correspondence : N.I. Makedonska Institute for Low Temperature Physics and Engineering 61103 Kharkov, Ukraine

Email address : makedonskaya@ilt.kharkov.ua