Exchange coupling induced antiferromagnetic-ferromagnetic transition in $Pr_{0.5}Ca_{0.5}MnO_3/La_{0.5}Ca_{0.5}MnO_3$ superlattices

P. Padhan; W. Prellier

doi:10.1103/PhysRevB.71.174419

paper

Exchange coupling induced antiferromagnetic-ferromagnetic transition in $P r_{0.5} C a_{0.5} M n O_{3} / L a_{0.5} C a_{0.5} M n O_{3}$ superlattices

arXiv:cond-mat/0503327 · doi:10.1103/PhysRevB.71.174419

Abstract

Superlattices built from two antiferromagnetic (AFM) charge/orbital order compounds, $P r_{0.5} C a_{0.5} M n O_{3}$ and $L a_{0.5} C a_{0.5} M n O_{3}$ , have been studied as the thickness of $L a_{0.5} C a_{0.5} M n O_{3}$ ( $L C M O$ ) varied. High structural quality thin films were obtained on $L a A l O_{3}$ substrates using the pulsed laser deposition technique. An antiferromagnetic-to-ferromagnetic transition, in addition to an enhancement of the coercivity, are observed as the $L C M O$ layer thickness increases. The small shift in the origin of the field-cooled hysteresis loop along the field axis indicates the presence of ferromagnetic and antiferromagnetic phases in the superlattices. We attribute these features to the AFM spin fluctuations at the $P r_{0.5} C a_{0.5} M n O_{3} / L a_{0.5} C a_{0.5} M n O_{3}$ interfaces resulting from the strain effects.

To be published in Phys. Rev. B

Exchange coupling induced antiferromagnetic-ferromagnetic transition in Pr0.5​Ca0.5​MnO3​/La0.5​Ca0.5​MnO3​ superlattices

Abstract

Exchange coupling induced antiferromagnetic-ferromagnetic transition in $P r_{0.5} C a_{0.5} M n O_{3} / L a_{0.5} C a_{0.5} M n O_{3}$ superlattices