Anisotropic effect of field on the orthorhombic-to-tetragonal transition in the striped cuprate
Joseph Henry Laboratories of Physics, Princeton University
Princeton, NJ 08544, USA
2 School of Frontier Sciences, University of Tokyo Yayoi 2-11-16, Bunkyo-ku, Tokyo 113-8656, Japan
Accepted: 26 April 2000
The Nd-doped cuprate displays a first-order phase transition at (= 74 K for x=0.10, y = 0.60) to a low-temperature tetragonal (LTT) phase. A magnetic field applied the a-axis leads to an increase in , whereas is decreased when . The field couples to the LTO-LTT instability in an anisotropic way that is not understood. Related anisotropic effects are observed in the uniform susceptibility and the in-plane magnetoresistance.
PACS: 74.72.Dn – La-based cuprates / 72.15.Gd – Galvanomagnetic and other magnetotransport effects / 75.25.+z – Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.)
© EDP Sciences, 2000