Volume 106, Number 3, May 2014
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||07 May 2014|
Supercurrents in half-metallic ferromagnetic La0.7Ca0.3MnO3
1 Department of Materials Science and Metallurgy, University of Cambridge - Pembroke Street, CB2 3QZ Cambridge, UK
2 Department of Physics, American University of Sharjah - Sharjah, PO Box: 26666, UAE
3 Department of Electrical and Computer Engineering, Texas AM University - College Station, TX, USA
Received: 4 December 2013
Accepted: 11 April 2014
Conventional singlet Cooper pairs from a superconductor (S) are short-ranged in a ferromagnet (F) because the magnetic exchange field in the latter acts differently on the antiparallel electrons which form the pair. This is not the case for parallel spin triplet pairs and long-range proximity effects have now been found in a variety of systems. A triplet supercurrent should be 100% spin-polarised in a half-metallic ferromagnet: here we show that inhomogeneous magnetism in all-oxide epitaxial S/half-metal/S heterostructures can generate the long-range supercurrents necessary to develop superconducting spin electronics.
PACS: 74.45.+c – Proximity effects; Andreev reflection; SN and SNS junctions / 74.50.+r – Tunneling phenomena; Josephson effects / 85.25.Cp – Josephson devices
© EPLA, 2014
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