Spin Seebeck effect in 
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: Test of bulk magnon spin current theory

Akopyan, A. A.; Prasai, Narayan; Trump, Benjamin A.; Marcus, Guy; McQueen, Tyrel M.; Cohn, J. L.

doi:10.1103/physrevb.101.100407

Cited by 9 publications

(6 citation statements)

References 40 publications

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“…A quantitative disentanglement of these spurious signals is therefore necessary in order to extract the intrinsic LSSE contribution . Other effects such as an electronically/magnetically coupled structural phase transition, phase coexistence, , and surface magnetization ,,− on the SSE have also been reported in various systems but have yet to be understood. It is therefore essential to find a magnetic system within which the effects can be investigated systematically.…”

Section: Introductionmentioning

confidence: 99%

Spin Seebeck Effect in Iron Oxide Thin Films: Effects of Phase Transition, Phase Coexistence, And Surface Magnetism

Chanda

Detellem

Pham

et al. 2022

ACS Appl. Mater. Interfaces

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Understanding impacts of phase transition, phase coexistence, and surface magnetism on the longitudinal spin Seebeck effect (LSSE) in a magnetic system is essential to manipulate the spin to charge current conversion efficiency for spincaloritronic applications. We aim to elucidate these effects by performing a comprehensive study of the temperature dependence of LSSE in biphase iron oxide (BPIO = -Fe2O3 + Fe3O4) thin films grown on Si (100) and Al2O3 (111) substrates. A combination of temperature-dependent anomalous Nernst effect (ANE) and electrical resistivity measurements show that the contribution of ANE from the BPIO layer is negligible compared to the intrinsic LSSE in the Si/BPIO/Pt heterostructure even at room temperature. Below the Verwey transition of the Fe3O4 phase, the total signal across BPIO/Pt is dominated by the LSSE. Noticeable changes in the intrinsic LSSE signal for both Si/BPIO/Pt and Al2O3/BPIO/Pt heterostructures around the Verwey transition of the Fe3O4 phase and the antiferromagnetic (AFM) Morin transition

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Section: Introductionmentioning

confidence: 99%

Spin Seebeck Effect in Iron Oxide Thin Films: Effects of Phase Transition, Phase Coexistence, And Surface Magnetism

Chanda

Detellem

Pham

et al. 2022

ACS Appl. Mater. Interfaces

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“…This could be due to the nature of the thermal spin signal observed from bulk magnetic materials, which have been found in other systems. [ 40,41 ]…”

Section: Resultsmentioning

confidence: 99%

“…This could be due to the nature of the thermal spin signal observed from bulk magnetic materials, which have been found in other systems. [40,41] It is most universally informative to present the transverse thermopower data in terms of transverse electric field per unit heat flux through the device cross-section. This helps avoid errors introduced by assumptions made about the actual temperature drop across the active device, [42,43] especially in a setup where the temperature of the Cu blocks is measured, as in this work.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Transverse Thermoelectric Voltage in the Au/Ni Foil Bilayer System via the Combination of Spin Seebeck Effect and Anomalous Nernst Effect

Piyasin

Pinitsoontorn

2022

Physica Status Solidi (a)

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The transverse thermoelectric voltage in the Au/Ni foil bilayer system has been investigated due to the combination of the spin Seebeck effect (SSE) and the anomalous Nernst effect (ANE) at room temperature. It is found that the transverse thermoelectric voltage proportionally increases with increasing applied temperature difference and approaches a constant value when the magnetization of the Ni foil reaches a saturation state. The measured thermoelectric voltage signal, about 0.424 ± 0.005 μV at 5 K of temperature difference, is the combination of the ANE signal from the Ni foil and the SSE signal from the Au/Ni foil bilayer system. The SSE and ANE coefficients are determined from the observed voltages, temperature difference, and dimension of the sample. Consequently, the SSE coefficient is found to be 2.5 times larger than the ANE coefficient. Moreover, the special dimensionless figure of merit for SSE is much greater than the obtained from ANE about 7 times. The work demonstrates the enhancement of the thermoelectric voltage due to the superposition of the SSE and ANE in the single bilayer system.

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“…in Figure 2 in the previous review article (2). Recent updates include ferromagnetic EuO (15), two-dimensional (2D) ferromagnetic Cr2Si2Te6, Cr2Ge2Te6 (16,17), ferrimagnetic garnet ferrites R3Fe5O12 (R = Eu, Tb, Dy, Tm) (18,19,20), Y3−xRxFe5O12 with R being 14 rare-earth elements from La to Lu (except for Pm) (21), Lu2Bi1Fe4Ga1O12 (22), spinel ferrites ZnFe2O4 (23), γ-Fe2O3 (24), LiFe5O8 (25), Ni0.65Zn0.35Al0.8Fe1.2O4 (26), Mg 0.5−δ Mn0.5Fe2O4 (27), Y-type hexagonal ferrites Ba2Co2Fe12O22, Ba2Zn2Fe12O22 (28), orthorhombic ferrimagnetic ε-Fe2O3 (29), molecular-based ferrimagnetic Cr II [Cr III (CN)6] (30), various antiferromagnetic (AF) insulators such as NiO (31,32,33,34), FeF2 (35), α-Fe2O3 (36,37), MnCO3 (38), α-Cu2V2O7 (39), SrFeO3 (40), SrMnO3 (41), DyFeO3 (42), and other intriguing materials including a chiral helimagnet Cu2OSeO3 with a skyrmion lattice phase (43,44) and quantum magnets Sr2CuO3 (45,46), CuGeO3 (47), Pb2V3O9 (48), LiCuVO4 (49). In particular, the ferrimagnetic insulator YIG has been essential (1,2), as it exhibits the lowest magnetic damping, high Curie temperature (TC ∼ 560 K), and high resistivity and also is a playground to reveal the role of magnon polarization in SSEs (see Section 6).…”

Section: Introductionmentioning

confidence: 99%

Spin Seebeck Effect: Sensitive Probe for Elementary Excitation, Spin Correlation, Transport, Magnetic Order, and Domains in Solids

Kikkawa,

Saitoh

2022

Preprint

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The spin Seebeck effect (SSE) refers to the generation of a spin current as a result of a temperature gradient in a magnetic material, which can be detected electrically via the inverse spin Hall effect in a metallic contact. Since the discovery of SSE in 2008, intensive studies on SSE have been conducted to elucidate its origin. SSEs appear in a wide range of magnetic materials including ferro-, ferri-, and antiferro-magnets and also paramagnets with classical or quantum spin fluctuation. SSE voltage reflects fundamental properties of a magnet, such as elementary excitation, static magnetic order, spin correlation, and spin transport. In this article, we review recent progress on SSEs in various systems, with particular emphasis on its emerging role as a probe of these magnetic properties in solids. We also briefly discuss the recently-discovered nuclear SSE.

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Spin Seebeck effect in Cu2OSeO3 : Test of bulk magnon spin current theory

Cited by 9 publications

References 40 publications

Spin Seebeck Effect in Iron Oxide Thin Films: Effects of Phase Transition, Phase Coexistence, And Surface Magnetism

Spin Seebeck Effect in Iron Oxide Thin Films: Effects of Phase Transition, Phase Coexistence, And Surface Magnetism

Enhanced Transverse Thermoelectric Voltage in the Au/Ni Foil Bilayer System via the Combination of Spin Seebeck Effect and Anomalous Nernst Effect

Spin Seebeck Effect: Sensitive Probe for Elementary Excitation, Spin Correlation, Transport, Magnetic Order, and Domains in Solids

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