Magnon-driven longitudinal spin Seebeck effect in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si0041.gif" overflow="scroll"><mml:mi>F</mml:mi><mml:mo>|</mml:mo><mml:mi>N</mml:mi></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si0042.gif" overflow="scroll"><mml:mi>N</mml:mi><mml:mo>|</mml:mo><mml:mi>F</mml:mi><mml:mo>|</mml:mo><mml:mi>N</mml:mi></mml:math> structures: Role of asymmetric in-plane magnetic anisotropy

Chotorlishvili, L.; Toklikishvili, Z.; Etesami, Seyyed Ruhollah; Dugaev, V. K.; Barnaś, J.; Berakdar, Jamal

doi:10.1016/j.jmmm.2015.08.059

Cited by 10 publications

(10 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The thermoelectric generation mechanism of the LSSE device is summarized as follows. The driving force of the LSSE is nonequilibrium dynamics of magnons, collective excitations of localized magnetic moments, in the magnetic insulator driven by the temperature gradient [166][167][168][169][170][171][172][173][174][175][176][177][178][179][180][181][182], since the LSSE appears even when a conduction electrons' contribution is completely frozen out. This nonequilibrium magnon dynamics in the magnetic insulator can interact with conduction-electron spins in the attached metal and transfer the spin angular momentum across at the metal/insulator interface via the interface sd exchange interaction, which is described in terms of the spin mixing conductance [133][134][135][136].…”

Section: Thermoelectric Generation Process and Measurement Configurationmentioning

confidence: 99%

“…In 2014, Rezende et al discussed the SSE in terms of a bulk magnon spin current created by a temperature gradient in a ferrimagnetic insulator [60]. Furthermore, various theoretical models of the magnon-driven SSE were also developed [169][170][171][174][175][176][177][178][179][180][181][182]. However, microscopic understanding of the relation between the magnon excitation and thermally generated spin current is yet to be fully established, and more detailed studies are necessary.…”

Section: B High Magnetic Field Dependencementioning

confidence: 99%

See 1 more Smart Citation

Thermoelectric Generation Based on Spin Seebeck Effects

et al. 2016

View full text Add to dashboard Cite

The spin Seebeck effect (SSE) refers to the generation of a spin current as a result of a temperature gradient in magnetic materials including insulators. The SSE is applicable to thermoelectric generation because the thermally generated spin current can be converted into a charge current via spin-orbit interaction in conductive materials adjacent to the magnets. The insulator-based SSE device exhibits unconventional characteristics potentially useful for thermoelectric applications, such as simple structure, device-design flexibility, and convenient scaling capability. In this article, we review recent studies on the SSE from the viewpoint of thermoelectric applications. Firstly, we introduce the thermoelectric generation process and measurement configuration of the SSE, followed by showing fundamental characteristics of the SSE device. Secondly, a theory of the thermoelectric conversion efficiency of the SSE device is presented, which clarifies the difference between the SSE and conventional thermoelectric effects and the efficiency limit of the SSE device. Finally, we show preliminary demonstrations of the SSE in various device structures for future thermoelectric applications and discuss prospects of the SSE-based thermoelectric technologies.

show abstract

Section: Thermoelectric Generation Process and Measurement Configurationmentioning

confidence: 99%

Section: B High Magnetic Field Dependencementioning

confidence: 99%

Thermoelectric Generation Based on Spin Seebeck Effects

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Refs. 5,[11][12][13][14] describe the non equilibrium magnon distribution through an effective magnon temperature different from the lattice temperature. However from an experimental point of view in Ref.…”

Section: Introductionmentioning

confidence: 99%

Nonequilibrium thermodynamics of the spin Seebeck and spin Peltier effects

et al. 2016

View full text Add to dashboard Cite

We study the problem of magnetization and heat currents and their associated thermodynamic forces in a magnetic system by focusing on the magnetization transport in ferromagnetic insulators like YIG. The resulting theory is applied to the longitudinal spin Seebeck and spin Peltier effects. By focusing on the specific geometry with one Y3Fe5O12 (YIG) layer and one Pt layer, we obtain the optimal conditions for generating large magnetization currents into Pt or large temperature effects in YIG. The theoretical predictions are compared with experiments from the literature permitting to derive the values of the thermomagnetic coefficients of YIG: the magnetization diffusion length lM ∼0.4 μm and the absolute thermomagnetic power coefficient εM∼10−2 TK−1

show abstract

“…12(a), (b). We numerically calculated the spin current generated by applying a temperature gradient T (x) = 15 − 15x 3000nm K (we used the standard recipe for treating the magnonic spin Seebeck effect [40]), and a spin current generated by applying nonuniform electric field and uniform temperature of the same order T = 15K. As we see, the amplitudes of the spin currents are quantitatively match each others.…”

Section: Thermal Gradient Vs E-field Gradientmentioning

confidence: 90%

Electric control of emergent magnonic spin current and dynamic multiferroicity in magnetic insulators at finite temperatures

et al. 2018

Self Cite

View full text Add to dashboard Cite

Conversion of thermal energy into magnonic spin currents and/or effective electric polarization promises new device functionalities. A versatile approach is presented here for generating and controlling open circuit magnonic spin currents and an effective multiferroicity at a uniform temperature with the aid of spatially inhomogeneous, external, static electric fields. This field applied to a ferromagnetic insulator with a Dzyaloshinskii-Moriya type coupling changes locally the magnon dispersion and modifies the density of thermally excited magnons in a region of the scale of the field inhomogeneity. The resulting gradient in the magnon density can be viewed as a gradient in the effective magnon temperature. This effective thermal gradient together with local magnon dispersion result in an open-circuit, electric field controlled magnonic spin current.In fact, for a moderate variation in the external electric field the predicted magnonic spin current is on the scale of the spin (Seebeck) current generated by a comparable external temperature gradient. Analytical methods supported by full-fledge numerics confirm that both, a finite temperature and an inhomogeneous electric field are necessary for this emergent non-equilibrium phenomena.The proposal can be integrated in magnonic and multiferroic circuits, for instance to convert heat into electrically controlled pure spin current using for example nanopatterning, without the need to generate large thermal gradients on the nanoscale.

show abstract

Magnon-driven longitudinal spin Seebeck effect in F|N and N|F|N structures: Role of asymmetric in-plane magnetic anisotropy

Cited by 10 publications

References 51 publications

Thermoelectric Generation Based on Spin Seebeck Effects

Thermoelectric Generation Based on Spin Seebeck Effects

Nonequilibrium thermodynamics of the spin Seebeck and spin Peltier effects

Electric control of emergent magnonic spin current and dynamic multiferroicity in magnetic insulators at finite temperatures

Contact Info

Product

Resources

About