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Interplay between superconductivity and magnetism in systems under pressure and thin films

Grant number: 13/14338-3
Support type:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): September 23, 2013
Effective date (End): September 22, 2014
Field of knowledge:Physical Sciences and Mathematics - Physics - Condensed Matter Physics
Principal researcher:Narcizo Marques de Souza Neto
Grantee:Larissa Sayuri Ishibe Veiga
Supervisor abroad: Daniel Haskel
Home Institution: Centro Nacional de Pesquisa em Energia e Materiais (CNPEM). Ministério da Ciência, Tecnologia e Inovações (Brasil). Campinas , SP, Brazil
Research place: Advanced Photon Source (APS), United States  
Associated to the scholarship:10/19979-9 - Interplay between magnetism and superconductivity by x-ray spectroscopies and electronic structure simulations, BP.DR


With this research project we propose to study the electronic, magnetic and atomic structure properties of bulk and thin films systems which exhibit the interplay between superconductivity and magnetism by performing advanced X-rays spectroscopy and X-ray diffraction techniques from synchrotron light sources. The ternary RERh4B4 compounds, with RE = Dy, Ho, Er and Tm, characterized by a crystalline structure that allows the emergence of superconductivity and magnetic ordering, will be investigated by XANES, XMCD and XRD techniques under high pressures and low temperature conditions. As an extension of this study we intend to investigate the magnetic behavior of artificially fabricated ferromagnet/superconductor thin films of Nb/FM and Pb/FM (with FM = Gd, Fe) using the X-ray resonant magnetic scattering (XRMS) technique. In this internship, the student Larissa will be collaborating with the Magnetic Materials Group of the Advanced Photon Source (APS - USA) under the scientific guidance of Dr. Daniel Haskel, where she will perform her experiments with techniques and instrumentation that are not yet available in Brazil. The beamtime for the experiments have been already obtained through the submission of proposals to the General Users Proposals (GUP) of APS. (AU)

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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)
HASKEL, D.; FABBRIS, G.; KIM, J. H.; VEIGA, L. S. I.; MARDEGAN, J. R. L.; ESCANHOELA, JR., C. A.; CHIKARA, S.; STRUZHKIN, V.; SENTHIL, T.; KIM, B. J.; et al. Possible Quantum Paramagnetism in Compressed Sr2IrO4. Physical Review Letters, v. 124, n. 6, . (13/14338-3)
TAKAYAMA, T.; KATO, A.; DINNEBIER, R.; NUSS, J.; KONO, H.; VEIGA, L. S. I.; FABBRIS, G.; HASKEL, D.; TAKAGI, H.. Hyperhoneycomb Iridate beta-Li2IrO3 as a Platform for Kitaev Magnetism. Physical Review Letters, v. 114, n. 7, . (13/14338-3)
VEIGA, L. S. I.; FABBRIS, G.; VAN VEENENDAAL, M.; SOUZA-NETO, N. M.; FENG, H. L.; YAMAURA, K.; HASKEL, D.. Fragility of ferromagnetic double exchange interactions and pressure tuning of magnetism in 3d-5d double perovskite Sr2FeOsO6. Physical Review B, v. 91, n. 23, . (13/14338-3)
FABBRIS, G.; LIM, J.; VEIGA, L. S. I.; HASKEL, D.; SCHILLING, J. S.. Electronic and structural ground state of heavy alkali metals at high pressure. Physical Review B, v. 91, n. 8, . (13/14338-3)
JEFFRIES, J. R.; VEIGA, L. S. I.; FABBRIS, G.; HASKEL, D.; HUANG, P.; BUTCH, N. P.; MCCALL, S. K.; HOLLIDAY, K.; JENEI, Z.; XIAO, Y.; et al. Robust ferromagnetism in the compressed permanent magnet Sm2Co17. Physical Review B, v. 90, n. 10, . (13/14338-3)
VEIGA, L. S. I.; ETTER, M.; GLAZYRIN, K.; SUN, F.; ESCANHOELA, C. A. JR; FABBRIS, G.; MARDEGAN, J. R. L.; MALAVI, P. S.; DENG, Y.; STAVROPOULOS, P. P.; et al. Pressure tuning of bond-directional exchange interactions and magnetic frustration in the hyperhoneycomb iridate beta-Li2IrO3. Physical Review B, v. 96, n. 14, . (13/14338-3, 16/24137-3)

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