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Metal insulator transition with ferrimagnetic order in epitaxial thin films of spinel NiCo2O4

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6 Author(s)
Silwal, Punam ; Department of Physics and Engineering Physics, Tulane University, New Orleans, Louisiana 70118, USA ; Miao, Ludi ; Stern, Ilan ; Zhou, Xiaolan
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We have grown epitaxial thin films of spinel NiCo2O4 on single crystalline MgAl2O4 (001) substrates by pulsed laser deposition. Magnetization measurement revealed hysteresis loops consistent with the reported ferrimagnetic order. The electrical transport exhibits a metallic behavior with the lowest resistivity of 0.8 mΩ cm and a metal insulator transition around the Néel temperature. The systematic variation in the properties of the films grown at different growth temperatures indicates a close relationship between the magnetic order and electrical transport.

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Applied Physics Letters  (Volume:100 ,  Issue: 3 )