Thermal expansion and magnetostriction of pure and doped RAgSb2 (R = Y, Sm, La) single crystals

Details Thermal expansion and magnetostriction of pure and doped RAgSb2 (R = Y, Sm, La) single crystals Thermal expansion and magnetostriction of pure and doped RAgSb2 (R = Y, Sm, La) single crystals

2007-11-07

arxiv.org/abs/0711.1080v1

Physics

Condensed Matter

Materials Science

Scientific paper

10.1088/0953-8984/20/11/115210

Data on temperature-dependent, anisotropic thermal expansion in pure and doped RAgSb2 (R = Y, Sm, La) single crystals are presented. Using the Ehrenfest relation and heat capacity measurements, uniaxial pressure derivatives for long range magnetic ordering and charge density wave transition temperatures are evaluated and compared with the results of the direct measurements under hydrostatic pressure. In-plane and c-axis pressure have opposite effect on the phase transitions in these materials, with in-plane effects being significantly weaker. Quantum oscillations in magnetostriction were observed for the three pure compounds, with the possible detection of new frequencies in SmAgSb2 and LaAgSb2. The uniaxial (along the c-axis) pressure derivatives of the dominant extreme orbits (beta) were evaluated for YAgSb2 and LaAgSb2.

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