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Title of Journal: Pramana J Phys

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Abbravation: Pramana

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Springer-Verlag

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10.1007/bf02123225

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0973-7111

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Appearance of an inhomogeneous superconducting sta

Authors: K Senapati R C Budhani
Publish Date: 2007/09/12
Volume: 69, Issue: 2, Pages: 267-275
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Abstract

An experimental study of proximity effect in La067Sr033MnO3YBa2CU3O7La067Sr033MnO3 trilayers is reported Transport measurements on these samples show clear oscillations in critical current I c as the thickness of La067Sr033MnO3 layers d F is scanned from ∼50 Å to ∼ 1100 Å In the light of existing theories of ferromagnetsuperconductor FMSC heterostructures this observation suggests a long range proximity effect in the manganite modulated by its weak exchange energy ∼2 meV The observed modulation of the magnetic coupling between the ferromagnetic LSMO layers as a function of d F also suggests an oscillatory behavior of the SC order parameter near the FMSC interface

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