Pressure-Induced Phase Transition in BaTiO<suB>3</suB> Nanocrystals

Chin. Phys. Lett.

2006, Vol. 23

Issue (5): 1249-1252 DOI:

Original Articles

Pressure-Induced Phase Transition in BaTiO₃ Nanocrystals

LI Feng-Ying¹;JIN Chang-Qing¹;YOU Shu-Jie¹;XIAO Chang-Jiang¹;YU Ri-Cheng¹;WANG Xiao-Hui²;LIU Jing³;LI Xiao-Dong³;LI Yan-Chun³;CHEN Liang-Chen¹

¹Institute of Physics, Chinese Academy of Sciences, Beijing 100080 ²Department of Materials, Tsinghua University, Beijing 100084 ³Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039

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LI Feng-Ying, JIN Chang-Qing, YOU Shu-Jie et al 2006 Chin. Phys. Lett. 23 1249-1252

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Abstract The crystal structure and electric properties of BaTiO₃ nanocrystals are studied by in situ high-pressure synchrotron radiation x-ray powder diffraction. The phase transition takes place not only in the samples of BaTiO₃ nanocrystals that are tetragonal phase with grain sizes more than 100nm, but also in the samples of BaTiO₃ nanocrystals that are cubic phase with grain sizes less than 100nm. The pressures of phase transition are found to increase with decrease of the grain size from about 4 to 10GPa for crystallites ranging from 200 to 10nm in radius. The bulk moduli are calculated according to Birch--Murnaghan state equation before and after the phase transition.

Keywords: 61.10.Nz 62.50.+p 77.84.-s

Published: 01 May 2006

PACS:	61.10.Nz
	62.50.+p
	77.84.-s	(Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2006/V23/I5/01249

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	LI Feng-Ying
	JIN Chang-Qing
	YOU Shu-Jie
	XIAO Chang-Jiang
	YU Ri-Cheng
	WANG Xiao-Hui
	LIU Jing
	LI Xiao-Dong
	LI Yan-Chun
	CHEN Liang-Chen

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