Pressure-induced re-entrant electronic and magnetic state in Pr[sub 0.7]Ca[sub 0.3]MnO[sub 3] manganite

Congwu Cui, Y.; Tyson, Trevor A.
October 2003
Applied Physics Letters;10/6/2003, Vol. 83 Issue 14, p2856
Academic Journal
In Pr[sub 0.7]Ca[sub 0.3]MnO[sub 3], pressure induces re-entrant magnetic and electronic state changes in the range from 1 atm to ∼6 GPa. The metal–insulator and magnetic transition temperatures coincide from ∼1 to 5 GPa, decouple outside of this range, and do not change monotonically with pressure. The effects may be explained by pressure-tuned competition between double exchange and super exchange. The insulating state induced by pressure above ∼5 GPa is possibly ferromagnetic, different from the ferromagnetic and antiferromagnetic phase-separated insulating state below ∼0.8 GPa. © 2003 American Institute of Physics.


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