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Anomalous barium filling fraction and n-type thermoelectric performance of BayCo4Sb12BayCo4Sb12
dc.contributor.authorChen, L. D.en_US
dc.contributor.authorKawahara, T.en_US
dc.contributor.authorTang, X. F.en_US
dc.contributor.authorGoto, T.en_US
dc.contributor.authorHirai, Toshioen_US
dc.contributor.authorDyck, Jeffrey S.en_US
dc.contributor.authorChen, Weien_US
dc.contributor.authorUher, Ctiraden_US
dc.date.accessioned2010-05-06T23:12:36Z
dc.date.available2010-05-06T23:12:36Z
dc.date.issued2001-08-15en_US
dc.identifier.citationChen, L. D.; Kawahara, T.; Tang, X. F.; Goto, T.; Hirai, T.; Dyck, J. S.; Chen, W.; Uher, C. (2001). "Anomalous barium filling fraction and n-type thermoelectric performance of BayCo4Sb12BayCo4Sb12." Journal of Applied Physics 90(4): 1864-1868. <http://hdl.handle.net/2027.42/71103>en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/71103
dc.description.abstractBarium-filled skutterudites BayCo4Sb12BayCo4Sb12 with an anomalously large filling fraction of up to y=0.44 have been synthesized. The lattice parameters increase linearly with Ba content. Magnetic susceptibility data show that Ba0.44Co4Sb12Ba0.44Co4Sb12 is paramagnetic, which implies that some of the Co atoms in BayCo4Sb12BayCo4Sb12 have acquired a magnetic moment. The presence of the two different valence states of Co (Co3+(Co3+ and Co2+)Co2+) leads to the anomalously large barium filling fraction even without extra charge compensation. All samples show n-type conduction. The electrical conductivity increases with increasing the Ba filling fraction. The lattice thermal conductivity of BayCo4Sb12BayCo4Sb12 is significantly depressed as compared to unfilled Co4Sb12.Co4Sb12. The dimensionless thermoelectric figure of merit, ZT, increases with increasing temperature reaching a maximum value of 1.1 for Ba0.24Co4Sb12Ba0.24Co4Sb12 at 850 K. © 2001 American Institute of Physics.en_US
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dc.publisherThe American Institute of Physicsen_US
dc.rights© The American Institute of Physicsen_US
dc.titleAnomalous barium filling fraction and n-type thermoelectric performance of BayCo4Sb12BayCo4Sb12en_US
dc.typeArticleen_US
dc.subject.hlbsecondlevelPhysicsen_US
dc.subject.hlbtoplevelScienceen_US
dc.description.peerreviewedPeer Revieweden_US
dc.contributor.affiliationumDepartment of Physics, University of Michigan, Ann Arbor, Michigan 48109en_US
dc.contributor.affiliationotherInstitute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japanen_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/71103/2/JAPIAU-90-4-1864-1.pdf
dc.identifier.doi10.1063/1.1388162en_US
dc.identifier.sourceJournal of Applied Physicsen_US
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dc.owningcollnamePhysics, Department of


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