Study of intermetalic compounds for thermoelectrical applications by x-ray diffraction

• Grant number: 09/10264-0
• Support type: Scholarships in Brazil - Doctorate
• Effective date (Start): September 01, 2009
• Effective date (End): January 31, 2014
• Field of knowledge: Physical Sciences and Mathematics - Physics
• Principal Investigator: Carlos Manuel Giles Antunez de Mayolo
• Grantee: José Renato Linares Mardegan
• Home Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated scholarship(s): 11/24166-0 - Study of intermetallic compounds using synchrotron radiation spectroscopy, BE.EP.DR

Abstract

This research project aims to study intermetallic compounds with thermoelectric properties using X-ray techniques from synchrotron radiation and conventional X-ray sources. We intend to study structural and magnetic properties of new intermetallic compounds with structural cages containing atoms that can scatter acoustic phonons. These materials have strong interest for technological applications in thermoelectricity. The samples are clathrates compounds of the R3M20N6 family, skutterudites compounds RM4Sn12 and Rameida compounds R3M4T13 (with R=rare earth, M=transition metal and T=Sn, In). The samples will be available through a collaboration with Prof. Dr. Pascoal G. Pagliuso (Group of Optical and Magnetic Properties of Solids - GPOMS - DEQ / IFGW / UNICAMP) and Prof. Dr. Marcos Ávila (Federal University of ABC - UFABC). The project involves structural measurements of mono and polycrystalline samples at low temperature (T ~ 2 K) as well as measurements of magnetic X ray diffraction using synchrotron radiation and also the use of other spectroscopic techniques with synchrotron radiation. A feasibility study to perform time resolved x-ray diffraction experiments on these compounds is also planned to obtain dynamical information of the atoms in the strucutural cages of these compounds.

Scientific publications

(6)

(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)

MARDEGAN, J. R. L.; FRANCOUAL, S.; FABBRIS, G.; VEIGA, L. S. I.; STREMPFER, J.; HASKEL, D.; RIBEIRO, R. A.; AVILA, M. A.; GILES, C. Magnetic properties of GdT2Zn20 (T = Fe, Co) investigated by x-ray diffraction and spectroscopy. Physical Review B, v. 93, n. 2 JAN 26 2016. Web of Science Citations: 2.

ADRIANO, C.; ROSA, P. F. S.; JESUS, C. B. R.; GRANT, T.; FISK, Z.; GARCIA, D. J.; PAGLIUSO, P. G. Magnetic properties of nearly stoichiometric CeAuBi2 heavy fermion compound. Journal of Applied Physics, v. 117, n. 17 MAY 7 2015. Web of Science Citations: 7.

PIVA, M. M.; BESSER, M.; MYDEEN, K.; GARITEZI, T. M.; ROSA, P. F. S.; ADRIANO, C.; GRANT, T.; FISK, Z.; URBANO, R. R.; NICKLAS, M.; PAGLIUSO, P. G. Combined external pressure and Cu-substitution studies on BaFe2As2 single crystals. JOURNAL OF PHYSICS-CONDENSED MATTER, v. 27, n. 14 APR 15 2015. Web of Science Citations: 2.

ADRIANO, C.; ROSA, P. F. S.; JESUS, C. B. R.; MARDEGAN, J. R. L.; GARITEZI, T. M.; GRANT, T.; FISK, Z.; GARCIA, D. J.; REYES, A. P.; KUHNS, P. L.; URBANO, R. R.; GILES, C.; PAGLIUSO, P. G. Physical properties and magnetic structure of the intermetallic CeCuBi2 compound. Physical Review B, v. 90, n. 23 DEC 10 2014. Web of Science Citations: 9.

MARDEGAN, J. R. L.; ADRIANO, C.; VESCOVI, R. F. C.; FARIA, G. A.; PAGLIUSO, P. G.; GILES, C. Magnetic structure of R2CoGa8 (R = Gd, Tb, and Dy): Structural tuning of magnetic properties in layered Ga-based intermetallic compounds. Physical Review B, v. 89, n. 11 MAR 4 2014. Web of Science Citations: 4.

MARDEGAN, J. R. L.; FABBRIS, G.; VEIGA, L. S. I.; ADRIANO, C.; AVILA, M. A.; HASKEL, D.; GILES, C. Pressure-induced amorphization and collapse of magnetic order in the type-I clathrate Eu8Ga16Ge30. Physical Review B, v. 88, n. 14 OCT 16 2013. Web of Science Citations: 6.

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

MARDEGAN, José Renato Linares. Studies of intermetallic compounds with cages investigated by spectroscopy and X-rays diffraction. 2014. Doctoral Thesis - Universidade Estadual de Campinas (UNICAMP). Instituto de Física Gleb Wataghin.