New Dichalcogenides Rh1-xPdxTe2, Ir1-xPdxTe2 and Rh1-xIrxTe2 with (0≤x≤1): crystallographic analysis and thermoelectric and magnetic studies

FLORENCIA LURGO; RAÚL CARBONIO; RODOLFO SANCHEZ

San Carlos de Bariloche

Congreso; International Workshop of Spintronics 2022-SPIN Argentina; 2022

Resonancias Magnéticas-CAB

We synthetized the new dichalcogenides families Rh1-xPdxTe2, Pd1-xIrxTe2 and Rh1-xIrxTe2 in vacuum evacuated quartz ampoule and cooling by quenching. All the compounds show a P3 ̅m1 (space group 164) hexagonal rearrangement. The compound IrTe2 show a reversible structural transition near to 200K (P3 ̅m1 to P1 ̅) monitored by X-ray diffraction by light synchrotron [1]. SEM images show “small bubbles” in the crystals of the compounds that contain only Te, this can be interpreted as a small excess of Te not detected for X-ray techniques. We report electric and thermoelectric properties for all the compounds. The electrical resistivity (ρ) for the compounds shows a Fermi liquid behavior in the temperature range (4-300K). Seebeck coefficient (S) data indicate hole-type carriers. The electronic thermal conductivity (κₑ) was determined by Wiedemann-Franz law. The magnetic measurements (χ vs T) show a Pauli paramagnetism behavior with strong interactions electron-phonon characteristic of metals.