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Manganite-based magnetic tunnel junction with piezoelectric barrier

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10 Author(s)
Mundle, R. ; Center for Materials Research, Norfolk State University, 700 Park Ave., Norfolk, Virginia 23504, USA ; Konda, R.B. ; Bamiduro, O. ; Yasar, O.
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We report on the fabrication and tunneling characteristics of pulsed-laser deposited LaSrMnO (LSMO)/PbZrTiO(PZT)/LSMO/SrTiO3 multilayers, using PZT layer as a tunnel barrier. The trilayer films show magnetic onset at about 360 K with ferromagnetic hysteresis at room temperature. The microscopic studies show that the effective barrier thickness is reduced due to the presence of defects in the barrier region. Our results suggest that the asymmetric deformation of the barrier potential profile induced by the ferroelectric polarization of PZT influences the tunneling characteristics and can be used for electrically controlled readout in quantum-computing schemes.

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Journal of Applied Physics  (Volume:105 ,  Issue: 7 )