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Thermal expansion derived lattice instabilities near maximum Tc in high-Tc cuprates

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Citation

Lang, M., Kürsch, R., Steglich, F., Wolf, T., Maeno, Y., Kumagai, K., et al. (1991). Thermal expansion derived lattice instabilities near maximum Tc in high-Tc cuprates. Physica C-Superconductivity and its Applications, 185, 1347-1348. doi:10.1016/0921-4534(91)91897-D.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0019-D4EF-F
Abstract
For the "214" cuprates, La2CuO4+delta, La2-xMxCuO4 (M = Sr, Ba) and Nd1.85Ce0.15CuO3.998, thermal expansion measurements reveal lattice instabilities at T1 = 31K and T2 = 36K. T2 coincides with T(c)max found upon 15 at% Sr doping. For YBa2Cu3O6.5 (T(c) = 49K) a lattice instability occurs at T = 90K, again close to T(c)max.