Thermoelectric Property in Multiferroics

Abstract:

Article Preview

Thermoelectricity has gained special interest due to its potential applications, especially the advancements in the electronic devices with very low power consumption. Thermoelectric materials can be used to make energy conversion devices that generate power from thermal sources. Multiferroic oxides, in particular cobaltates, have been actively studied as a new type of thermoelectric material (1). The crystal structure of these cobaltates offers a possibility to manipulate Seebeck coefficient, electric conductivity, and thermal conductivity to optimize the figure of merit ZT. The theoretical explanation and experimental observations by some investigators proved the candidature of multiferroic materials for thermoelectric generation. Many semiconducting multiferroic oxides are showing spin dependent Seebeck coefficient (2-3). Moreover, most of these oxides are inherently stable at high temperatures in air, making them a suitable material for high temperature applications. In this work we have investigated the multiferroic and thermoelectric properties of thinfilms of doped cobalt oxide matrices. The observations confirmed that these materials are suitable for thermoelectric generation.

Info:

Periodical:

Edited by:

D. Rajan Babu

Pages:

157-161

Citation:

T. Ramachandran et al., "Thermoelectric Property in Multiferroics", Advanced Materials Research, Vol. 584, pp. 157-161, 2012

Online since:

October 2012

Export:

Price:

$38.00

[1] Chenglong Jia and Jamal Berakdar, Applied Physics Letters 98, (2011), 192111.

[2] Koshibae. W, . Tsutsui. K and . Maekawa, S Phisical review B, 62(2000) 6869.

[3] Ichiro Matsubara et al, Cation substituted (Ca2CoO3)xCoO2 films and their thermoelectric properties, Applied Physics letters, 80, (2002), 4730.

DOI: https://doi.org/10.1063/1.1489706

[4] Shigeo Yamaguchi et al Thermoelectric properties of Al 1-x InxN and Al1-y- z GayInzN prepared by radio frequency sputtering: Towards a thermoelectric power device , Applied Physics letters, 82, (2003), (2065).

DOI: https://doi.org/10.1063/1.1560560

[5] Tripathi M.N. et alMaterial parameters for thermoelectric performance, Pramana, (2005).

[6] Yayu Wang et alSpin entropy as the likely source of enhanced thermo power in NaxCo2O4, Nature, 423, ( 2003), 425.

[7] R. Ramesh and N.A. Spaldin, NatureMater(2007) 21.