Thermoelectric characterization of singlecrystalline type-I clathrates Ba8GayMzGe46-y-z (M = Au, Ag, Cu) and Ba8-xRxGayAgzGe46-y-z (R = La, Ce, Eu)

• Grant number: 17/01827-7
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Start date: May 01, 2017
• End date: October 31, 2017
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Marcos de Abreu Avila
• Grantee: Fabiana Rodrigues Arantes
• Supervisor: Toshiro Takabatake
• Host Institution: Centro de Ciências Naturais e Humanas (CCNH). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil
• Institution abroad: Hiroshima University, Japan
• Associated to the scholarship: 14/20365-6 - Preparation and characterization of new thermoelectric clathrates containing trivalent rare earths and mixed acceptors, BP.PD

Abstract

We propose to characterize novel single crystals of germanium-based clathrates with respect to their thermoelectric properties. We have synthesized several sets of such samples, which have the general formulae Ba8GayMzGe46-y-z (M = Au, Ag, Cu) and Ba8-xRxGayAgzGe46-y-z (R = La, Ce, Eu). The inclusion of rare earth elements is expected to improve their thermoelectric conversion efficiency, which is very desirable from an applied perspective. The thermoelectric characterization consists of measurements of the quantities that yield the figure of merit of a thermoelectric material: the electrical resistivity, thermal conductivity and Seebeck coefficient. They are to be carried out in the group of Professor Toshiro Takabatake, at the University of Hiroshima, which is one of the leading groups in the area.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

ARANTES, FABIANA R.; ARISTIZABAL-GIRALDO, DEISY; MAYOH, DANIEL A.; YAMANE, YU; YANG, CHONGLI; LEES, MARTIN R.; OSORIO-GUILLEN, JORGE M.; TAKABATAKE, TOSHIRO; AVILA, MARCOS A.. Superconductivity in monocrystalline YNiSi3 and LuNiSi3. PHYSICAL REVIEW B, v. 99, n. 22, p. 14-pg., 2019-06-11. (12/17562-9, 14/20365-6, 11/19924-2, 17/01827-7)

ARANTES, FABIANA R.; ARISTIZABAL-GIRALDO, DEISY; MAYOH, DANIEL A.; YAMANE, YU; YANG, CHONGLI; LEES, MARTIN R.; OSORIO-GUILLEN, JORGE M.; TAKABATAKE, TOSHIRO; AVILA, MARCOS A.. Superconductivity in monocrystalline YNiSi3 and LuNiSi3. Physical Review B, v. 99, n. 22, JUN 11 2019. (12/17562-9, 14/20365-6, 11/19924-2, 17/01827-7)