Ferromagnetism and metal-like transport in antiferromagnetic insulator heterostructures

Details Ferromagnetism and metal-like transport in antiferromagnetic insulator heterostructures Ferromagnetism and metal-like transport in antiferromagnetic insulator heterostructures

2005-06-15

arxiv.org/abs/cond-mat/0506351v1

Appl. Phys. Lett. 87 (2005) 022506

Physics

Condensed Matter

Materials Science

To be published in Applied Physics Letters

Scientific paper

10.1063/1.1992657

Strained Pr$_{0.5}$Ca$_{0.5}$MnO$_3$/La$_{0.5}$Ca$_{0.5}$MnO$_3$/Pr$_{0.5}$Ca$_{0.5}$MnO $_3$ trilayers were grown on (001)-SrTiO$_3$ substrates using the pulsed-laser deposition technique. The coupling at the interfaces of several trilayers has been investigated from magnetization and electronic transport experiments. An increase of La$_{0.5}$Ca$_{0.5}$MnO$_3$ layer thickness induces a magnetic ordering in the strain layers and at the interfaces leading to ferromagnetic behavior and enhanced coercivity, while resistivity shows metal-like behaviors. These effects are not observed in the parent compounds, which are antiferromagnetic insulators, opening a path, to induce artificially some novel properties.

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