Magnetotransport Properties of CaTi_xRu_{1-x}O_3 (x=0, 0.07)

• Authors: A. Zorkovská , A. Baran , A. Feher , J. Šebek , E. Šantavá , I. Bradarić
• Languages of publication: EN

Abstracts

EN

Electrical resistance, transversal magnetoresistance and the Hall effect were studied on polycrystalline CaTi_xRu_{1-x}O_3 (x=0, 0.07) samples using a conventional Quantum Design PPMS-9 equipment in the temperature range 2-300 K and magnetic field up to 9 T. Substantial differences were found between the two samples: (i) opposite to the metallic character of CaRuO_3, the substituted sample has insulating-like electrical resistance;(ii) the magnetoresistance of the substituted sample changes the sign from negative to positive values with increasing temperature. The magnetoresistance of CaRuO_3 is negative, the sign reversal is induced by magnetic field and only at temperatures below 15 K, such a behaviour is predicted for clustered systems;(iii) the Hall voltage in pure CaRuO_3 also changes sign from negative to positive values above 35 K. This temperature coincides with the observed magnetic transition temperature, indicating that the magnetic state and the carrier character interrelate.

Keywords

EN

74.70.Pq; 73.43.Qt; 75.47.-m

Discipline

• 75.47.-m: Magnetotransport phenomena; materials for magnetotransport(for spintronics, see 85.75.-d; see also 72.25.-b Spin polarized transport; 72.15.Gd Galvanomagnetic and other magnetotransport effects; for magnetotransport effects in thin films, see 73.50.Jt; see also 73.43.Qt Magnetoresistance)
• 74.70.Pq: Ruthenates
• 73.43.Qt: Magnetoresistance(see also 75.47.-m Magnetotransport phenomena; materials for magnetotransport in magnetic properties and materials)

• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 1
• Pages: 351-354

Dates

published

2008-01

received

2007-07-09

Contributors

author

A. Zorkovská

• Centre of Low Temperature Physics of the P.J. Šafárik University, and the Slovak Academy of Science, Park Angelinum 9, 04154 Košice, Slovakia

author

A. Baran

• Centre of Low Temperature Physics of the P.J. Šafárik University, and the Slovak Academy of Science, Park Angelinum 9, 04154 Košice, Slovakia

author

A. Feher

• Centre of Low Temperature Physics of the P.J. Šafárik University, and the Slovak Academy of Science, Park Angelinum 9, 04154 Košice, Slovakia

author

J. Šebek

• Institute of Physics, AS CR, Na Slovance 2, 18221 Prague, Czech Republic

author

E. Šantavá

• Institute of Physics, AS CR, Na Slovance 2, 18221 Prague, Czech Republic

author

I. Bradarić

• The "Vinča" Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Serbia

References

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Identifiers

DOI

10.12693/APhysPolA.113.351