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The Nd-doped cuprate La_{2-y-x}Nd_ySr_xCuO_4 displays a first-order phasetransition at T_d (= 74 K for x=0.10, y = 0.60) to a low-temperature tetragonal(LTT) phase. A magnetic field H applied || the a-axis leads to an increase inT_d, whereas T_d is decreased when H || c. These effects show that magneticordering involving both Nd and Cu spins plays a key role in driving the LTO-LTTtransition. Related anisotropic effects are observed in the uniformsusceptibility and the in-plane magnetoresistance.Comment: 5 pages, 5 figure

europhysics letters

Anisotropic effect of field on the orthorhombic-to-tetragonal transition in the striped cuprate (La,Nd) 2 − x Sr x CuO 4