Microwave and magnetotransport properties of RuSr2RCu2O8 (R=Eu,Gd) doped with Sn

Scientific paper - Original scientific paper

• Author: Miroslav Požek
• Author: Ivan Kupčić
• Author: Antonije Dulčić
• Author: Amir Hamzić
• Author: Dalibor Paar
• Author: Mario Basletić
• Author: Emil Tafra
• Author: G. V. M. Williams
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

Ru1−xSnxSr2EuCu2O8 and Ru1−xSnxSr2GdCu2O8 have been comprehensively studied by microwave and dc resistivity and magnetoresistivity and by the Hall measurements. The ruthenium magnetic ordering temperature Tm is considerably reduced with increasing Sn content. However, doping with Sn leads to only slight reduction of the superconducting critical temperature Tc accompanied with the increase in the upper critical field Bc2, indicating an increased disorder in the system and a reduced scattering length of the conducting holes in CuO2 layers. In spite of the increased scattering rate, the normal state resistivity and the Hall resistivity are reduced with respect to the pure compound, due to the increased number of itinerant holes in CuO2 layers, which represent the main conductivity channel. Most of the electrons in RuO2 layers are presumably localized, but the observed negative magnetoresistance and the extraordinary Hall effect lead to the conclusion that there exists a small number of itinerant electrons in RuO2 layers that exhibit colossal magnetoresistance.

• Keywords (english): Ruthenates; Transport properties; response to EM fields; magnetic properties; Colossal magnetoresistance
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical review B: Condensed matter and materials physics
• Numbering: vol. 77, no. 21, 214514
• p-ISSN: 1098-0121
• e-ISSN: 1550-235X
• DOI: https://doi.org/10.1103/PhysRevB.77.214514
• URN:NBN: urn:nbn:hr:217:156426
• Publication: 2008
• Project: Number: 119-1191458-1023; Title (croatian): Sustavi s prostornim i dimenzijskim ograničenjima: korelacije i spinski efekti; Leader: Amir Hamzić; Jurisdiction: Croatia; Funding stream: ZP
• Project: Number: 119-1191458-0512; Title (croatian): Niskodimenzionalni jako korelirani vodljivi sustavi; Leader: Slaven Barišić; Jurisdiction: Croatia; Funding stream: ZP
• Project: Number: 119-1191458-1022; Title (croatian): Mikrovalna istraživanja novih materijala; Leader: Miroslav Požek; Jurisdiction: Croatia; Funding stream: ZP
• Document URL: http://link.aps.org/doi/10.1103/PhysRevB.77.214514
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright (2008) by the American Physical Society. Received 10 December 2007; revised manuscript received 21 April 2008; published 17 June 2008.
• Created on: 2019-10-19 16:28:52