Ferromagnetism and metal-like transport in antiferromagnetic insulator heterostructures

P. Padhan; P. Murugavel; W. Prellier

doi:10.1063/1.1992657

paper

Ferromagnetism and metal-like transport in antiferromagnetic insulator heterostructures

arXiv:cond-mat/0506351 · doi:10.1063/1.1992657

Abstract

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.

To be published in Applied Physics Letters