Sikder, Bablu and Chanda, Abhijit and Goswami, Sudipta and Bhattacharya, Dipten and Velaga, Srihari (2019) Influence of spin-state transition on structural and other physical properties in Ba0.5Sr0.5Co0.8Fe0.2O3-delta ceramic. Materials Chemistry and Physics, 236. Art No-UNSP 121770. ISSN 0254-0584

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We explore, in detail, the remarkable influence of spin-state transition - low (S = 1/2) to high spin (S = 5/2) - on crystallographic, thermal, electrical, and mechanical properties in Ba0.5Sr0.5Co0.8Fe0.2O3-delta ceramic. The low to high spin transition takes place at T* similar to 600 K with a rather broad transition zone of nearly 200 K. We find that the electrical resistivity, mechanical stiffness and toughness, thermal expansion coefficient, and the crystallographic structure exhibit clear anomalous features around T*. The transition, however, appears to be isostructural Pm (3) over barm -> Pm (3) over barm (cubic -> cubic). Significant influence of spin-state transition on a variety of properties could have serious implications for several applications ranging from magnetic sensors to electrocatalysts to ion separation membranes.

Item Type: Article
Subjects: Electronics
Divisions: Sensor and Actuator
Depositing User: Bidhan Chaudhuri
Date Deposited: 20 Nov 2019 11:01
Last Modified: 20 Nov 2019 11:01

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