On the theory of absorption and dispersion in paramagnetic and dielectric media

Gorter, C.J.; Kronig, R. de L.

doi:10.1016/s0031-8914(36)80327-9

Cited by 82 publications

(22 citation statements)

References 9 publications

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“…19 This model can also be applied to the TMC effect in the MTJs, because it is valid for the calculation of dynamic dielectric constant in a wide variety of insulating solid and liquid systems. [21][22][23][24] In this letter, we present the frequency dependence of TMC in the MTJs theoretically and experimentally. According to our calculation based on Debye-Fr€ ohlich model combined with Julliere formula, the TMC ratio strongly depends on frequency with a maximum peak at a specific frequency.…”

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confidence: 99%

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Large magnetocapacitance effect in magnetic tunnel junctions based on Debye-Fröhlich model

Kaiju

Takei

Misawa

et al. 2015

Applied Physics Letters

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The frequency dependence of tunneling magnetocapacitance (TMC) in magnetic tunnel junctions (MTJs) is investigated theoretically and experimentally. According to the calculation based on Debye-Fröhlich model combined with Julliere formula, the TMC ratio strongly depends on the frequency and it has the maximum peak at a specific frequency. The calculated frequency dependence of TMC is in good agreement with the experimental results obtained in MgO-based MTJs with a tunneling magnetoresistance (TMR) ratio of 108%, which exhibit a large TMC ratio of 155% at room temperature. This calculation also predicts that the TMC ratio can be as large as about 1000% for a spin polarization of 87%, while the TMR ratio is 623% for the same spin polarization. These theoretical and experimental findings provide a deeper understanding on AC spin-dependent transport in the MTJs and will open up wider opportunities for device applications, such as highly sensitive magnetic sensors and impedance-tunable devices.

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“…[21][22][23][24] Based on the model, 25 the complex dielectric constant e* can be generally represented by…”

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confidence: 99%

Large magnetocapacitance effect in magnetic tunnel junctions based on Debye-Fröhlich model

Kaiju

Takei

Misawa

et al. 2015

Applied Physics Letters

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“…Paramagnetic relaxation in a variety of solids had been observed down to liquid helium temperatures. The theory of how these electron spins relaxed to the solid host involved an effective spin-lattice relaxation time Ti (5,6). By 1940, several of the physical mechanisms behind Ti had been elucidated (7,8).…”

Section: Initial Sparks For Epr In a Gasmentioning

confidence: 99%

Early Epr in Some Gases

Castle¹

1998

Foundations of Modern EPR

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“…Experimentally, the interactions between phonons and magnetic ions were first explored in the Netherlands by Gorter (42) and by Goiter and Kronig (43). Dielectric relaxation, the interaction of molecular electric dipoles with electromagnetic waves, had previously been treated by Debye, who also suggested (44) that the temperature dependence arose from thermal agitation.…”

Section: Spin-lattice Interactionmentioning

confidence: 99%

Paramagnetism, Before Magnetic Resonance

Bleaney¹

1998

Foundations of Modern EPR

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On the theory of absorption and dispersion in paramagnetic and dielectric media

Cited by 82 publications

References 9 publications

Large magnetocapacitance effect in magnetic tunnel junctions based on Debye-Fröhlich model

Large magnetocapacitance effect in magnetic tunnel junctions based on Debye-Fröhlich model

Early Epr in Some Gases

Paramagnetism, Before Magnetic Resonance

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