Emergent Spin-Filter at the interface between Ferromagnetic and Insulating Layered Oxides

Yaohua Liu; F. A. Cuellar; Z. Sefrioui; J. W. Freeland; M. R. Fitzsimmons; C. Leon; J. Santamaria; S. G. E. te Velthuis

doi:10.1103/PhysRevLett.111.247203

Emergent Spin-Filter at the interface between Ferromagnetic and Insulating Layered Oxides

Materials Science 2013-12-12 v2 Mesoscale and Nanoscale Physics Strongly Correlated Electrons

Authors: Yaohua Liu , F. A. Cuellar , Z. Sefrioui , J. W. Freeland , M. R. Fitzsimmons , C. Leon , J. Santamaria , S. G. E. te Velthuis

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

We report a strong effect of interface-induced magnetization on the transport properties of magnetic tunnel junctions consisting of ferromagnetic manganite La $_{0.7}$ Ca $_{0.3}$ MnO $_{3}$ and insulating cuprate PrBa $_{2}$ Cu $_{3}$ O $_{7}$ . Contrary to the typically observed steady increase of the tunnel magnetoresistance with decreasing temperature, this system exhibits a sudden anomalous decrease at low temperatures. Interestingly, this anomalous behavior can be attributed to the competition between the positive spin polarization of the manganite contacts and the negative spin-filter effect from the interface-induced Cu magnetization.

Keywords

magnetic tunnel junctions manganites spin transport

Cite

@article{arxiv.1307.5475,
  title  = {Emergent Spin-Filter at the interface between Ferromagnetic and Insulating Layered Oxides},
  author = {Yaohua Liu and F. A. Cuellar and Z. Sefrioui and J. W. Freeland and M. R. Fitzsimmons and C. Leon and J. Santamaria and S. G. E. te Velthuis},
  journal= {arXiv preprint arXiv:1307.5475},
  year   = {2013}
}

Comments

5 pages, 4 figures, with supplemental materials (2 figures). Physical Review Letters, in press

Emergent Spin-Filter at the interface between Ferromagnetic and Insulating Layered Oxides

Abstract

Keywords

Cite

Comments

Related papers