Ferromagnetism and metal-like transport in antiferromagnetic insulator heterostructures

Padhan, P.; Murugavel, P.; Prellier, W.
July 2005
Applied Physics Letters;7/11/2005, Vol. 87 Issue 2, p022506
Academic Journal
Strained Pr0.5Ca0.5MnO3/La0.5Ca0.5MnO3/Pr0.5Ca0.5MnO3 trilayers were grown on (001)-SrTiO3 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 La0.5Ca0.5MnO3 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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