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Non-conventional supercondutivity and magnetism

Grant number: 03/09861-7
Support type:PRONEX Research - Thematic Grants
Duration: January 01, 2005 - June 30, 2008
Field of knowledge:Physical Sciences and Mathematics - Physics - Condensed Matter Physics
Cooperation agreement: CNPq - Pronex
Principal Investigator:Iakov Veniaminovitch Kopelevitch
Grantee:Iakov Veniaminovitch Kopelevitch
Home Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Co-Principal Investigators:Sergio Moehlecke


With this research Project we are planning to concentrate our efforts on a study of the interplay between superconductivity and magnetism in unconventional superconductors and related systems. Both an extensive experimental and theoretical work should be performed with a close collaboration between experimental and theoretical groups. Our proposal is based on recent advances in the physics of carbon-based materials, heavy fermion superconductors, and related strongly correlated systems in which the occurrence of superconductivity may be coupled to either ferromagnetic or antiferromagnetic order parameters. Briefly, we are planning to study recently discovered ferromagnetic and superconducting correlations in graphite and graphite-sulfur composites, antiferromagnetism and quantum fluctuations in heavy fermions systems. From the theoretical side, we propose to verify a possible occurrence of the Luttinger liquid in the carbon nanotubes, which is particularly interesting issue in the light of the recent observation of superconducting correlations in carbon nanotubes, and relativistic effects on magnetotransport properties in superconductors. We do hope to provide a significant contribution into the field. In order to achieve this goal we should develop various noveI experimental and theoretical approaches, including sample preparation and characterization methods. We should also effectively use already available at our institutions experimental techniques for (1) ac and dc susceptibility, (2) magnetization, (3) specific heat, (4) magnetotransport, (5) x-ray diffraction, (6) electron spin resonance, (7) microwave absorption, and (8) Raman scattering measurements. Many undergraduate and graduate students and recent Ph.D scientists will be involved in this Project. (AU)

Scientific publications (4)
(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)
ADRIANO‚ C.; LORA-SERRANO‚ R.; GILES‚ C.; DE BERGEVIN‚ F.; LANG‚ JC; SRAJER‚ G.; MAZZOLI‚ C.; PAOLASINI‚ L.; PAGLIUSO‚ PG. Magnetic structure of Sm_ {2} IrIn_ {8} determined by x-ray resonant magnetic scattering. Physical Review B, v. 76, n. 10, p. 104515, 2007.
URBANO‚ RR; BITTAR‚ EM; PIRES‚ MA; FERREIRA‚ L.M.; BUFAIÇAL‚ L.; RETTORI‚ C.; PAGLIUSO‚ PG; MAGILL‚ B.; OSEROFF‚ SB; THOMPSON‚ JD; OTHERS. Multiband effects in the electron spin resonance of Gd^{3+} in the intermediate-valence compound YbAl_ {3} and its reference compound LuAl_ {3}. Physical Review B, v. 75, n. 4, p. 045107, 2007.
LORA-SERRANO‚ R.; GILES‚ C.; GRANADO‚ E.; GARCIA‚ DJ; MIRANDA‚ E.; AGÜERO‚ O.; FERREIRA‚ L.M.; DUQUE‚ JGS; PAGLIUSO‚ PG. Magnetic structure and enhanced T_ {N} of the rare-earth intermetallic compound TbRhIn_ {5}: Experiments and mean-field model. Physical Review B, v. 74, n. 21, p. 214404, 2006.
PIRES‚ MA; ISRAEL‚ C.; IWAMOTO‚ W.; URBANO‚ RR; AGÜERO‚ O.; TORRIANI‚ I.; RETTORI‚ C.; PAGLIUSO‚ PG; WALMSLEY‚ L.; LE‚ Z.; OTHERS. Role of oxygen vacancies in the magnetic and dielectric properties of the high-dielectric-constant system CaCu_ {3} Ti_ {4} O_ {12}: An electron-spin resonance study. Physical Review B, v. 73, n. 22, p. 224404, 2006.

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