Magneto-transport properties of the rutheno-cuprated RuSr{sub 2}GdCu{sub 2}O{sub 8}

Journal Article · Wed Dec 01 04:00:00 EST 1999 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1023/A:1022571601164· OSTI ID:20015294

McCrone, J E; Cooper, J R; Tallon, J L

RuSr{sub 2}GdCu{sub 2}O{sub 8} (Ru-1212) is a triple perovskite containing both CuO{sub 2} and RuO{sub 2} layers. It has attracted a great deal of interest recently because it displays electronic ferromagnetism and superconductivity coexisting on a microscopic scale, with T{sub Curie} {approximately} 135K and {Tc} up to 50K. The authors report magnetization and magnetoresistance (MR) data that exhibit effects due to the interaction between the ferromagnetic ruthenium moments and the conduction electrons. The MR is negative at temperatures above T{sub Curie}, and is proportional to the square of the applied field well above this temperature. Below T{sub Curie} the MR displays a positive peak at fields of around 15 kOe, but at high fields it becomes negative again, and approximately linear. They analyze the high temperature data in terms of spin-disorder scattering theory and extract a value for the exchange interaction between the carriers in the CuO{sub 2} planes and the Ru spins.

• Research Organization: Univ. of Cambridge (GB)
• OSTI ID: 20015294
• Journal Information: Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 5-6 Vol. 117; ISSN JLTPAC; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER OXIDES
CURIE POINT
FERROMAGNETISM
GADOLINIUM OXIDES
HIGH-TC SUPERCONDUCTORS
MAGNETORESISTANCE
RUTHENIUM OXIDES
STRONTIUM OXIDES
SUPERCONDUCTIVITY
TRANSITION TEMPERATURE