# Magnetotransport study on $La_{0.5}Sr_{0.5}CoO_{3-\delta}/Yba_2Cu_3O_{7-\delta }/La_{0.7}Ca_{0.3}MnO_{3-\delta}$ trilayer system

Samal, D and Shivakumara, C and Kumar, Anil PS (2008) Magnetotransport study on $La_{0.5}Sr_{0.5}CoO_{3-\delta}/Yba_2Cu_3O_{7-\delta }/La_{0.7}Ca_{0.3}MnO_{3-\delta}$ trilayer system. In: Physical Review B, 77 (9). 094510-1-094510-5.

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## Abstract

Epitaxial ferromagnetic $(La_{0.5}Sr_{0.5}CoO_{3-\delta}$/superconducting $(YBa_2Cu_3O_{7-\delta})$ /ferromagnetic $(La_{0.7}Ca_{0.3}MnO_{3-\delta})$ trilayers are grown by pulsed laser deposition. The magnetotransport studies reveal that a much lower magnetic field is required to suppress the superconductivity in the trilayer. Moreover, the superconducting $T_c$ is markedly different for the trilayer system when the magnetic field is applied parallel to the c axis compared to that perpendicular to the c axis $(T_{c \parallel c axis}<T_{c \bot c axis})$. The trilayer system also exhibits a huge +ve magnetoresistance below superconducting $T_c,$ which could arise due to vortex dissipation in the liquid state of a superconductor in the trilayer structure.

Item Type: Journal Article Physical Review B The American Physical Society Copyright of this article belongs to The American Physical Society. Division of Chemical Sciences > Solid State & Structural Chemistry UnitDivision of Physical & Mathematical Sciences > Physics 06 Aug 2008 19 Sep 2010 04:48 http://eprints.iisc.ac.in/id/eprint/15458