Da. Wright et al., SPECIFIC-HEAT OF LA1.875-XNDXSR0.125CUO4 - MAGNETIC AND STRUCTURAL TRANSITIONS, Physica. B, Condensed matter, 194, 1994, pp. 469-470
Near 70K (La,Ba)2CuO4 undergoes a structural transition from orthorhom
bic to tetragonal symmetry (LTO-->LTT). Partial substitution of La by
Nd produces an additional transition that has been observed in structu
ral studies. The specific heats of La1.475Nd0.4Sr0.125CuO4 and La1.275
Nd0.6Sr0.125CuO4 samples exhibit anomalies near 75K, which are associa
ted with these structural transitions, and additional smaller anomalie
s near 30K, which may be associated with a magnetic transition detecte
d by muSR.