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Study of the physical properties of nanostructured materials and fundamental interactions in bulk systems

Grant number: 16/15780-0
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): May 01, 2017
Effective date (End): January 31, 2019
Field of knowledge:Physical Sciences and Mathematics - Physics - Condensed Matter Physics
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Carlos Rettori
Grantee:Michael Cabrera Baez
Home Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil


This project has two lines of basic research. The first proposes the investigation of structural, thermodynamic and electronic properties of nanostructured systems. In particular, two types of nanoparticles (NPs) will be studied: i) Simple metal NPs using noble and transition metals type Au, Ag, Pd, Pt, Cu Al with diluted magnetic impurities (mainly rare earths) and ii) try to obtain intermetallic NPs binary systems (e.g. YIn3, GdIn3, YPb3, GdPb3) doped with rare earth (Gd, Nd, Er, Dy). The goal is a better understanding (macroscopic and local) of the different quantum states and microscopic interactions in the reduction of dimensionality. This study will allow the comparison of different physical interactions bulk and nano, tuning one or more of the basic relevant properties for practical applications. In addition, X-ray diffraction measurements, TEM, DLS and magnetization will be performed that combined with electron spin resonance measurements (ESR), will give a better understanding of the correlation between spin, charge, and lattice size degrees of freedom present in these systems. The second line of research is associated with massive systems (bulk) in which it is proposed to investigate the magnetic interactions in complex cage systems. That systems of the type RT2X20 (R = Gd, Er, Nd, Y; T = Fe, Co, Mn and X = Zn, Cd, Hg) have rare earth sites quite distant among them thus allowing a clearer study of physical phenomena involved (exchange interactions and crystal field effects). The development of this project will be developed at UNICAMP-GPOMS in the new nanotechnology laboratory in close collaboration with the condensed matter Laboratory of the Quantum Materials group (UFABC). The realization of this project in two years will contribute to a significant advance in understanding the microscopic properties of massive and nanostructured systems. (AU)

Scientific publications (5)
(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)
DE QUEIROZ, THIAGO B.; CABRERA-BAEZ, MICHAEL; MENEGASSO, PAULO; MARTINEZ, EDUARDO D.; GARCIA FLORES, ALI F.; RETTORI, CARLOS; URBANO, RICARDO R. Probing Surface Effects on alpha-NaYF4 Nanoparticles by Nuclear Magnetic Resonance. Journal of Physical Chemistry C, v. 124, n. 17, p. 9523-9535, APR 30 2020. Web of Science Citations: 0.
CABRERA-BAEZ, M.; AVILA, M. A.; RETTORI, C. Conduction electrons in aperiodic versus periodic structures: An ESR study of quasicrystalline i-Y(Gd)-Cd and its approximant Y(Gd)Cd-6. Physical Review B, v. 100, n. 1 JUL 31 2019. Web of Science Citations: 0.
CABRERA-BAEZ, M.; AVILA, M. A.; RETTORI, C. Gd3+ as a probing and tuning tool of strong electronic correlations in the heavy-fermion Kondo lattice compound YbFe2Zn20. Physical Review B, v. 98, n. 16 OCT 3 2018. Web of Science Citations: 0.
CABRERA-BAEZ, M.; DENIS, V. C.; MENDONCA-FERREIRA, L.; CARLONE, M.; VENEGAS, P. A.; AVILA, M. A.; RETTORI, C. Unusual evolution from a superconducting to an antiferromagnetic ground state in Y1-xGdxPb3 (0 <= x <= 1). Physical Review B, v. 97, n. 22 JUN 22 2018. Web of Science Citations: 1.
CABRERA-BAEZ, M.; FINATTI, B. F.; RETTORI, C.; AVILA, M. A. Single crystal growth and characterization of the intermetallic cubic cage system YCo1.82Mn0.18Zn20. PHYSICA B-CONDENSED MATTER, v. 536, p. 850-854, MAY 1 2018. Web of Science Citations: 0.

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