Ettingshausen Effect and Thermomagnetic Cooling

O’Brien, Brendan J.; Wallace, C. S.

doi:10.1063/1.1723352

Cited by 64 publications

(21 citation statements)

References 3 publications

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“…For avoiding the influence of the negative effects, such as Ettingshausen effect [29], Nernst effect and so on [30], we used the measurement method shown in Table 1.…”

Section: Room Temperature Transport Measurementsmentioning

confidence: 99%

Study on temperature-dependent carrier transport for bilayer graphene

Liu

et al. 2015

Physica E: Low-dimensional Systems and Nanostructures

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“…For avoiding the influence of the negative effects, such as Ettingshausen effect [29], Nernst effect and so on [30], we used the measurement method shown in Table 1.…”

Section: Room Temperature Transport Measurementsmentioning

confidence: 99%

Study on temperature-dependent carrier transport for bilayer graphene

Liu

et al. 2015

Physica E: Low-dimensional Systems and Nanostructures

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“…These thermomagnetic effects are similar to the transverse thermoelectric effects except that they require the application of a high magnetic field that is perpendicular to both the electric and thermal flows. 2 The thermoelectric effects become smaller when there are two types of charge carrier, since the electrons and holes act in opposition. However, in the transverse thermomagnetic phenomena the electrons and holes assist one another.…”

Section: Introductionmentioning

confidence: 99%

Application of the Transverse Thermoelectric Effects

Goldsmid

2010

Journal of Elec Materi

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Most thermoelectric applications make use of the longitudinal Seebeck and Peltier effects. However, it is possible to produce thermoelectric effects in which the electrical and thermal flows are perpendicular to one another. This has certain practical advantages; for example, it makes possible the realization of an infinite-staged cascade refrigerator using a single piece of material. The benefits of separating the directions of the electrical and thermal currents have been demonstrated convincingly at low temperatures using the transverse thermomagnetic effects, but at ordinary temperatures the transverse thermoelectric effects are of more interest. These effects are to be found in any material in which the Seebeck coefficient is anisotropic. However, for them to be of practical value, a large and strongly anisotropic Seebeck coefficient must be combined with a high ratio of electrical to thermal conductivity. There is no known homogeneous substance in which this combination of properties is to be found. On the other hand, it is possible to obtain the required parameters in a synthetic material consisting of two phases. The two components A and B should form a couple with a large conventional figure of merit Z AB . The optimum value for the transverse figure of merit Z / can approach Z AB only when the two components have very different electrical and thermal conductivities. Various workers have used semiconductor-metal or semiconductorsemimetal combinations in attempts to satisfy these requirements. It has also been proposed that the necessary combination of properties might be met by making one of the components porous. The work that has been done on synthetic transverse thermoelements will be reviewed, and the prospects for practical devices will be discussed.

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“…Therefore, the purification of the selected candidate can enhance its thermoelectric performance. Moreover, the geometry of the Ettingshausen effect allows the design of an infinite-stage refrigerator [35]. To be widely used, such a cooler should work with permanent magnets which can currently produce fields of the order of 1 T.…”

Section: While the Case Of Bismuth Shows That A Giant Nernstmentioning

confidence: 99%

Nernst Effect in Semimetals: The Effective Mass and the Figure of Merit

2007

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We present a study of electric, thermal and thermoelectric transport in elemental Bismuth, which presents a Nernst coefficient much larger than what was found in correlated metals. We argue that this is due to the combination of an exceptionally low carrier density with a very long electronic mean-free-path. The low thermomagnetic figure of merit is traced to the lightness of electrons. Heavy-electron semi-metals, which keep a metallic behavior in presence of a magnetic field, emerge as promising candidates for thermomagnetic cooling at low temperatures.

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Ettingshausen Effect and Thermomagnetic Cooling

Cited by 64 publications

References 3 publications

Study on temperature-dependent carrier transport for bilayer graphene

Study on temperature-dependent carrier transport for bilayer graphene

Application of the Transverse Thermoelectric Effects

Nernst Effect in Semimetals: The Effective Mass and the Figure of Merit

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