Softer region at boundary of supercooled liquid–crystal in glassy fresnoite

Takahashi, Yoshihiro; Osada, Minoru; Masai, Hirokazu; Fujiwara, Takumi
June 2009
Applied Physics Letters;6/15/2009, Vol. 94 Issue 24, p241909
Academic Journal
The transition between the supercooled liquid (SCL) and crystal phases was investigated by in situ observation of boson peak in a glassy fresnoite (Ba2TiSi2O8) with an extremely high nucleation ability. The glassy fresnoite revealed anomalous boson behavior, in that the boson peak's full width at half maximum diverged at T/Tg∼1.2. This behavior suggests that an elastically softer region exists at the interface of the fresnoite nucleus/crystallite in the SCL state.


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