Local Charge and Spin Currents in Magnetothermal Landscapes

Weiler, Mathias; Althammer, Matthias; Czeschka, Franz D.; Huebl, Hans; Wagner, M.; Opel, Matthias; Imort, Inga-Mareen; Reiss, Günter; Thomas, Andy; Gross, Rudolf; Goennenwein, Sebastian T. B.

doi:10.1103/physrevlett.108.106602

Cited by 247 publications

(252 citation statements)

References 35 publications

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“…Thus, the angle dependence of V perfectly corresponds to the crossproduct of Eq. (1) contribution for α = 0 • could be the magnetic anisotropy of the NiFe 2 O 4 films as was also demonstrated for YIG films 14 . Therefore, measurements using vibrating sample magnetometry (VSM) are performed and presented in Fig.…”

Section: Fig 2 (A) Andmentioning

confidence: 78%

Thermally driven spin and charge currents in thin NiFe2O4/Pt films

et al. 2013

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We present results on the longitudinal spin Seebeck effect (LSSE) shown by semiconducting ferrimagnetic NiFe2O4/Pt films from room temperature down to 50 K base temperature. To the best of our knowledge, this is the first observation of spin caloric effect in NiFe2O4 thin films. The temperature dependence of the conductivity has been studied in parallel to obtain information about the origin of the electric potentials detected at the Pt coverage of the ferrimagnet in order to distinguish the LSSE from the anomalous Nernst effect. Furthermore, the dependence of the LSSE on temperature gradients as well as the influence of an external magnetic field direction is investigated.PACS numbers: 72.20.Pa

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Section: Fig 2 (A) Andmentioning

confidence: 78%

Thermally driven spin and charge currents in thin NiFe2O4/Pt films

et al. 2013

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“…[3][4][5] For the opposite effect, to use Pt as a spin current injector, a charge current is sent through the Pt, creating a transverse spin accumulation by the spin-Hall effect (SHE). [6][7][8] Recently, Weiler et al 9 and Huang et al 10 observed magnetoresistance (MR) effects in Pt on YIG and related those effects to magnetic proximity. These MR effects have been further investigated by Nakayama et al 11 and they found and explained a new magnetoresistance, called spin-Hall magnetoresistance (SMR).…”

Section: Introductionmentioning

confidence: 99%

Spin-Hall magnetoresistance in platinum on yttrium iron garnet: Dependence on platinum thickness and in-plane/out-of-plane magnetization

et al. 2013

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Spin-Hall magnetoresistance in platinum on yttrium iron garnet Vlietstra, N.; Shan, J.; Castel, V.; van Wees, B. J.; Ben Youssef, J. Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. The occurrence of spin-Hall magnetoresistance (SMR) in platinum (Pt) on top of yttrium iron garnet (YIG) has been investigated, for both in-plane and out-of-plane applied magnetic fields and for different Pt thicknesses [3, 4, 8, and 35 nm]. Our experiments show that the SMR signal directly depends on the in-plane and out-of-plane magnetization directions of the YIG. This confirms the theoretical description, where the SMR occurs due to the interplay of the spin-orbit interaction in the Pt and the spin-mixing conductance at the YIG/Pt interface. Additionally, the sensitivity of the SMR and spin pumping signals on the YIG/Pt interface conditions is shown by comparing two different deposition techniques (e-beam evaporation and dc sputtering).

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“…We can model this situation by contacting the spin chain either at the two ends or at some intermediate site. The former configuration corresponds to the "longitudinal" spin Seebeck effect [36][37][38][39][40][41], while the latter one is referred to as "transverse" [35,[42][43][44][45][46] or "nonlocal" [47]. The spin dynamics at the interface pumps a spin current into the contact at site n given by…”

Section: Spin Pumping and Spin Seebeck Effectsmentioning

confidence: 99%

Energy repartition in the nonequilibrium steady state

2017

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The concept of temperature in nonequilibrium thermodynamics is an outstanding theoretical issue. We propose an energy repartition principle that leads to a spectral (mode-dependent) temperature in steady-state nonequilibrium systems. The general concepts are illustrated by analytic solutions of the classical Heisenberg spin chain connected to Langevin heat reservoirs with arbitrary temperature profiles. Gradients of external magnetic fields are shown to localize spin waves in a Wannier-Zeemann fashion, while magnon interactions renormalize the spectral temperature. Our generic results are applicable to other thermodynamic systems such as Newtonian liquids, elastic solids, and Josephson junctions.

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Local Charge and Spin Currents in Magnetothermal Landscapes

Cited by 247 publications

References 35 publications

Thermally driven spin and charge currents in thin NiFe2O4/Pt films

Thermally driven spin and charge currents in thin NiFe2O4/Pt films

Spin-Hall magnetoresistance in platinum on yttrium iron garnet: Dependence on platinum thickness and in-plane/out-of-plane magnetization

Energy repartition in the nonequilibrium steady state

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