Print Email Facebook Twitter Spin-Hall magnetoresistance and spin Seebeck effect in spin-spiral and paramagnetic phases of multiferroic CoCr2O4 films Title Spin-Hall magnetoresistance and spin Seebeck effect in spin-spiral and paramagnetic phases of multiferroic CoCr2O4 films Author Aqeel, A. Vlietstra, N. Heuver, J.A. Bauer, G.E.W. Noheda, B. Van Wees, B.J. Palstra, T.T.M. Faculty Applied Sciences Department QN/Quantum Nanoscience Date 2015-12-08 Abstract We report on the spin-Hall magnetoresistance (SMR) and spin Seebeck effect (SSE) in multiferroic CoCr2O4 (CCO) spinel thin films with Pt contacts. We observe a large enhancement of both signals below the spin-spiral (Ts=28K) and the spin lock-in (Tlock?in=14K) transitions. The SMR and SSE responses in the spin lock-in phase are one order of magnitude larger than those observed at the ferrimagnetic transition temperature (Tc=94K), which indicates that the interaction between spins at the Pt|CCO interface is more efficient in the noncollinear magnetic state. At T>Tc, magnetic-field-induced SMR and SSE signals are observed, which can be explained by a high interface susceptibility. Our results show that the spin transport at the Pt|CCO interface is sensitive to the magnetic phases but cannot be explained solely by the bulk magnetization. To reference this document use: http://resolver.tudelft.nl/uuid:c3f2cdb0-29de-4658-846d-441b43b069a7 Publisher American Physical Society ISSN 1098-0121 Source https://doi.org/10.1103/PhysRevB.92.224410 Source Physical Review B, 92 (22), 2015 Part of collection Institutional Repository Document type journal article Rights © 2015 American Physical Society Files PDF 326356.pdf 886.22 KB Close viewer /islandora/object/uuid:c3f2cdb0-29de-4658-846d-441b43b069a7/datastream/OBJ/view