Abstract (EN):
Detailed measurements of the pyroelectric coefficient and optical birefringence in betaine arsenate, in a temperature range centred at the ferroelectric phase transition(T-c2 approximate to 121 K) are reported. The critical behaviour of the spontaneous polarization is analyzed from these data and a cross-over between two different critical regimes is evidenced. Results of linear and non-linear dielectric constant measured along [001] are also reported.
Idioma:
Inglês
Tipo (Avaliação Docente):
Científica
Nº de páginas:
10
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