Synthesis and Characterization of Doped Rare Earth Stannates ATbSn2O7 (A = Er, Ho, Dy)

• Grant number: 24/17855-3
• Support Opportunities: Scholarships in Brazil - Master
• Start date: September 01, 2025
• End date: November 30, 2026
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Rafael Sá de Freitas
• Grantee: Emanuelle Felipe de Almeida
• Host Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 21/12470-8 - Research in quantum materiais involving intense magnetic fields and low temperatures, AP.TEM

Abstract

In this project we aim to investigate several materials from the A2B2O7 family, with magnetically frustrated structures such as pyrochlore or fluorite, where A is a 3+ rare-earth ion and B is a 4+ transition metal (Zr, Ti, Hf). Combining the effects of structural disorder and magnetic frustration, this class of materials attracts great interest from the international scientific community due to the extensive diversity of exotic behaviors at low temperatures. We intend to synthesize the stannates ATbSn2O7 (A = Er, Ho, Dy), which are frustrated pyrochlores, using the solid state technique and an alternative chemical route, the sol-gel technique. We will investigate the physical properties of all materials, through various experimental techniques, including X-ray diffraction, electron microscopy, Raman scattering, magnetic susceptibility and specific heat. (AU)