Dielectric signatures of lattice instabilities at 32K and 245K in $La{2-y}Sr{y}MO_{4+x}$ (M=Cu,Ni) Cuprates and Nickelates
New dielectric transitions are observed at common temperatures 32K and 245K, in isostructural $La{2}CuO{4+x}$ and $La{5/3}Sr{1/3}NiO_{4},$ that are signatures of local lattice (octahedral) instabilities. The present dielectric transitions reveal new aspects of the phase diagram of the perovskite cup...
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| Online Access: | http://hdl.handle.net/2047/d20000738 |