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Proximity effects induced by a gold layer on La0.67Sr0.33MnO3 thin films

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11 Author(s)
Bertacco, R. ; LNESS-CNISM-Dipartimento di Fisica, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy ; Brivio, S. ; Cantoni, M. ; Cattoni, A.
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The authors report about La0.67Sr0.33MnO3 single crystal manganite thin films in interaction with a gold capping layer. With respect to uncoated manganite layers of the same thickness, Au-capped 4 nm thick manganite films reveal a dramatic reduction (≃185 K) of the Curie temperature TC and a lower saturation low temperature magnetization M0. A sizable TC reduction (≃60 K) is observed even when an inert SrTiO3 layer is inserted between the gold film and the 4 nm thick manganite layer, suggesting that this effect might have an electrostatic origin.

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Applied Physics Letters  (Volume:91 ,  Issue: 10 )