Thermal conductivity of pure and Mg-doped CuGeO_3 in the incommensurate phase

J. Takeya, I. Tsukada, Yoichi Ando +5

The thermal conductivity κof Cu_1-xMg_xGeO_3 is measured in magnetic fields up to 16 T. At the transition field H_c to the high-field incommensurate (I) phase, κabruptly decreases.…