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Intrinsic Tunneling in Phase Separated Manganites
Physical Review Letters
We present evidence of direct electron tunneling across intrinsic insulating regions in submicrometer wide bridges of the phase-separated ferromagnet ðLa; Pr; CaÞMnO 3 . Upon cooling below the Curie temperature, a predominantly ferromagnetic supercooled state persists where tunneling across the intrinsic tunnel barriers (ITBs) results in metastable, temperature-independent, high-resistance plateaus over a large range of temperatures. Upon application of a magnetic field, our data reveal thatdoi:10.1103/physrevlett.102.077205 pmid:19257712 fatcat:nw5oawflxrh2herwrsbzp3tgjm