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Tantalum doping in HfO2: orthorhombic phase formation at ambient conditions and change in path of pressure-induced structural evolution

ABSTRACT A systematic study of orthorhombic phase formation at ambient conditions beyond a critical concentration of dopant Tantalum (Ta) in HfO is reported. The effect on the path of structural evolution due to Ta doping in HfO was also investigated. Studies on Ta-doped HfO samples and their path of structural evolution under compression have significant implications for materials undergoing β-decay. The effect of continual doping due to β-decay from geophysical point of view is discussed.