Modulating the Spin Seebeck Effect in Co2FeAl Heusler Alloy for Sensor Applications

The thermoelectric conversion technique has been explored in a broad range of heat-flow sensors. In this context, the Spin Seebeck Effect emerges as an attractive candidate for biosensor applications, not only for the sensibility improvement but also for the power-saving electronic devices development. Here, we investigate the Longitudinal Spin Seebeck Effect in films with a Co 2 FeAl/W bilayer structure grown onto GaAs (100) substrate, systems having induced uniaxial magnetic anisotropy combined with cubic magnetic anisotropy. From numerical calculations, we address the magnetic behavior and thermoelectric response of the films. By comparing experiment and theory, we explore the possibility of modulating a thermoelectric effect by magnetic anisotropy. We show that the thermoelectric voltage curves may be modulated by the association of magnetic anisotropy induction and experimental parameters employed in the LSSE experiment.

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Vectorial observation of the spin Seebeck effect in epitaxial NiFe2O4 thin films with various magnetic anisotropy contributions

Applied Physics Letters ◽

10.1063/1.5092774 ◽

2019 ◽

Vol 114 (23) ◽

pp. 232404 ◽

Cited By ~ 3

Author(s):

Zhong Li ◽

Jan Krieft ◽

Amit Vikram Singh ◽

Sudhir Regmi ◽

Ankur Rastogi ◽

...

Keyword(s):

Thin Films ◽

Magnetic Anisotropy ◽

Seebeck Effect ◽

Spin Seebeck Effect

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Intrinsic surface magnetic anisotropy in Y3Fe5O12 as the origin of low-magnetic-field behavior of the spin Seebeck effect

Physical Review B ◽

10.1103/physrevb.92.014415 ◽

2015 ◽

Vol 92 (1) ◽

Cited By ~ 24

Author(s):

Ken-ichi Uchida ◽

Jun-ichiro Ohe ◽

Takashi Kikkawa ◽

Shunsuke Daimon ◽

Dazhi Hou ◽

...

Keyword(s):

Magnetic Field ◽

Magnetic Anisotropy ◽

Seebeck Effect ◽

Spin Seebeck Effect ◽

Field Behavior ◽

Surface Magnetic Anisotropy ◽

Low Magnetic Field

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Spin Seebeck Effect of Correlated Magnetic Molecules

10.21203/rs.3.rs-199989/v1 ◽

2021 ◽

Author(s):

Anand Manaparambil ◽

Ireneusz Weymann

Keyword(s):

Magnetic Anisotropy ◽

Exchange Interaction ◽

Thermoelectric Properties ◽

Seebeck Effect ◽

Group Method ◽

Model Parameters ◽

Strongly Correlated ◽

Spin Seebeck Effect ◽

Molecular Core ◽

Core Spin

Abstract In this paper we investigate the spin-resolved thermoelectric properties of strongly correlated molecular junctions in the linear response regime. The magnetic molecule is modeled by a single orbital level to which the molecular core spin is attached by an exchange interaction. Using the numerical renormalization group method we analyze the behavior of the (spin) Seebeck effect, heat conductance and figure of merit for different model parameters of the molecule. We show that the thermopower strongly depends on the strength and type of the exchange interaction as well as the molecule's magnetic anisotropy. When the molecule is coupled to ferromagnetic leads, the thermoelectric properties reveal an interplay between the spin-resolved tunneling processes and intrinsic magnetic properties of the molecule. Moreover, in the case of finite spin accumulation in the leads, the system exhibits the spin Seebeck effect. We demonstrate that a considerable spin Seebeck effect can develop when the molecule exhibits an easy-plane magnetic anisotropy, while the sign of the spin thermopower depends on the type and magnitude of the molecule's exchange interaction.

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Probing the temperature-dependent magnetic anisotropy and longitudinal spin Seebeck effect in Y3Fe5O12

AIP Advances ◽

10.1063/1.4973948 ◽

2017 ◽

Vol 7 (5) ◽

pp. 055912 ◽

Cited By ~ 1

Author(s):

Vijaysankar Kalappattil ◽

Raja Das ◽

Manh-Huong Phan ◽

Hariharan Srikanth

Keyword(s):

Magnetic Anisotropy ◽

Seebeck Effect ◽

Temperature Dependent ◽

Spin Seebeck Effect ◽

Longitudinal Spin

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Spin Seebeck effect of correlated magnetic molecules

Scientific Reports ◽

10.1038/s41598-021-88373-7 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Anand Manaparambil ◽

Ireneusz Weymann

Keyword(s):

Magnetic Anisotropy ◽

Exchange Interaction ◽

Thermoelectric Properties ◽

Seebeck Effect ◽

Group Method ◽

Model Parameters ◽

Strongly Correlated ◽

Spin Seebeck Effect ◽

Molecular Core ◽

Core Spin

AbstractIn this paper we investigate the spin-resolved thermoelectric properties of strongly correlated molecular junctions in the linear response regime. The magnetic molecule is modeled by a single orbital level to which the molecular core spin is attached by an exchange interaction. Using the numerical renormalization group method we analyze the behavior of the (spin) Seebeck effect, heat conductance and figure of merit for different model parameters of the molecule. We show that the thermopower strongly depends on the strength and type of the exchange interaction as well as the molecule’s magnetic anisotropy. When the molecule is coupled to ferromagnetic leads, the thermoelectric properties reveal an interplay between the spin-resolved tunneling processes and intrinsic magnetic properties of the molecule. Moreover, in the case of finite spin accumulation in the leads, the system exhibits the spin Seebeck effect. We demonstrate that a considerable spin Seebeck effect can develop when the molecule exhibits an easy-plane magnetic anisotropy, while the sign of the spin thermopower depends on the type and magnitude of the molecule’s exchange interaction.

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Anomalous Nernst effect in stressed magnetostrictive film grown onto flexible substrate

Scientific Reports ◽

10.1038/s41598-019-51971-7 ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 3

Author(s):

Acácio Silveira Melo ◽

Alexandre Barbosa de Oliveira ◽

Carlos Chesman ◽

Rafael Domingues Della Pace ◽

Felipe Bohn ◽

...

Keyword(s):

Magnetic Properties ◽

Magnetic Anisotropy ◽

Electronic Devices ◽

External Stress ◽

Voltage Response ◽

Nernst Effect ◽

Uniaxial Magnetic Anisotropy ◽

Thermoelectric Voltage ◽

Magnetostrictive Film ◽

Anomalous Nernst Effect

Abstract The anomalous Nernst effect in nanostructured magnetic materials is a key phenomenon to optimally control and employ the internal energy dissipated in electronic devices, being dependent on, for instance, the magnetic anisotropy of the active element. Thereby, here, we report a theoretical and experimental investigation of the magnetic properties and anomalous Nernst effect in a flexible magnetostrictive film with induced uniaxial magnetic anisotropy and under external stress. Specifically, we calculate the magnetization behavior and the thermoelectric voltage response from a theoretical approach for a planar geometry, with magnetic free energy density that takes into account the induced uniaxial and magnetoelastic anisotropy contributions. Experimentally, we verify modifications of the effective magnetic anisotropy by changing the external stress, and explore the anomalous Nernst effect, a powerful tool to investigate the magnetic properties of magnetostrictive materials. We find quantitative agreement between experiment and numerical calculations, thus elucidating the magnetic behavior and thermoelectric voltage response. Besides, we provide evidence to confirm the validity of the theoretical approach to describe the magnetic properties and anomalous Nernst effect in ferromagnetic magnetostrictive films having uniaxial magnetic anisotropy and submitted to external stress. Hence, the results place flexible magnetostrictive systems as promising candidates for active elements in functionalized touch electronic devices.

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