The effect of matrix on the ferroelectric phase transition in the nanocomposites NaNO2 + SBA-15 and NaNO2+3D-SBA-15.

Authors :: Alekseeva, Olga A.
Naberezhnov, Aleksandr A.
Stukova, Elena V.
Novikova, Svetlana A.
Sumnikov, Sergey V.
Source :: Ferroelectrics; 2020, Vol. 567 Issue 1, p61-66, 6p
Publication Year :: 2020
Abstract: The temperature evolution of crystal structure and ferroelectric order parameter η(T) in nanocomposite materials "SBA-15 + NaNO<subscript>2</subscript>" have been studied by neutron diffraction. The large (∼15 K) temperature hysteresis in dependences of η(T) on heating and on cooling has been observed. It is shown that a cause of this effect is an influence of elastic strains arising upon heating and leading to a change in the temperature of the ferroelectric phase transition. [ABSTRACT FROM AUTHOR]

Subjects :: MATRIX effect
FERROELECTRIC transitions
FERROELECTRICITY
PHASE transitions
NEUTRON diffraction

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