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Pressure-induced spin state transition in BiFeO3: an ab initio electronic structure calculation

Published online by Cambridge University Press:  12 August 2014

Satyanarayan Patel  and
Sudhir K. Pandey
Satyanarayan Patel*
Affiliation:
School of Engineering, Indian Institute of Technology Mandi, Himachal Pradesh 175001, India
Sudhir K. Pandey
Affiliation:
School of Engineering, Indian Institute of Technology Mandi, Himachal Pradesh 175001, India
*
ae-mail: satyou1990@gmail.com
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Abstract

In this work, we study the pressure-induced spin state transition in BiFeO3 by using ab initio electronic structure calculations. The applied pressure is simulated through lattice compression. The Fe ion is found to be in the high-spin (S = 5/2) state in the insulating ground state. Along with Bi6p, Feeg and O2p orbitals are also found to be important in deciding the transport behaviour of the compound. At about 38 GPa the spin state of the Fe ion changes from high-spin to low-spin (S = 1/2) accompanied by the corresponding insulator to metal transition. This pressure is found to be in fairly good agreement with that observed experimentally.

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Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 67 , Issue 2 , August 2014 , 20602
Copyright
© EDP Sciences, 2014

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