Anomalous Transport Properties of Carbon-Doped EuB_6

• Authors: M. Batkova , I. Batko , V. Filipov , K. Flachbart , V. Sechovský , N. Shitsevalova , E. Šantavá , J. Šebek
• Languages of publication: EN

Abstracts

EN

In the presented work we report electrical, magnetic and thermal properties of EuB_{6-x}C_{x} single crystals with an estimated value of x ≈ 0.07. Our studies reveal an antiferromagnetic phase transition at T_{N} ≈ 6.7 K. Electrical resistivity at zero magnetic field shows a pronounced resistivity maximum at T_{M} ≈ 7 K, just above the antiferromagnetic phase transition temperature. With increasing applied magnetic field the maximum moves to lower temperature and becomes totally suppressed at the field of 9 T. Observed magnetoresistance is negative in the whole studied temperature range 2-20 K, yielding a ratio of ρ(0 T, 7 K)/ρ(9 T, 7 K) ≈ 2.5. The origin of such magnetoresistance is associated with formation of mixed magnetic structure in the system due to fluctuation of carbon concentration.

Keywords

EN

75.30.Kz; 72.15.Gd; 75.47.Gk

Discipline

• 75.47.Gk: Colossal magnetoresistance
• 72.15.Gd: Galvanomagnetic and other magnetotransport effects(see also 75.47.-m Magnetotransport phenomena; materials for magnetotransport)
• 75.30.Kz: Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)(for ferroelectric phase transitions, see 77.80.B-; for superconductivity phase diagrams, see 74.25.Dw)

• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 5
• Pages: 893-894

Dates

published

2010-11

Contributors

author

M. Batkova

• Institute of Experimental Physics, Slovak Academy of Sciences, 040 01 Košice, Slovak Republic

author

I. Batko

• Institute of Experimental Physics, Slovak Academy of Sciences, 040 01 Košice, Slovak Republic

author

V. Filipov

• Institute for Problems of Material Science, NASU, 252680 Kiev, Ukraine

author

K. Flachbart

• Institute of Experimental Physics, Slovak Academy of Sciences, 040 01 Košice, Slovak Republic

author

V. Sechovský

• Charles University in Prague, Faculty of Mathematics and Physics, Ke Karlovu 5, 121 16 Prague, Czech Republic

author

N. Shitsevalova

• Institute for Problems of Material Science, NASU, 252680 Kiev, Ukraine

author

E. Šantavá

• Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 182 21 Prague, Czech Republic

author

J. Šebek

• Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 182 21 Prague, Czech Republic

References

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• 2. J.M. Tarascon, J.L. Soubeyroux, J. Etorneau, R. Georges, J.M. Coey, O. Massenet, Solid State Commun. 37, 133 (1981)
• 3. I. Batko, M. Batkova, K. Flachbart, D. Macko, E.S. Konovalova, Yu.B. Paderno, J. Magn. Magn. Mater. 140-144, 1177 (1995)
• 4. M. Batkova, I. Batko, K. Flachbart, Z. Janu, K. Jurek, J. Kováč, M. Reiffers, V. Sechovský, N. Shitsevalova, E. Šantavá, J. Šebek, Phys. Rev. B 78, 224414 (2008)
• 5. M. Batkova, I. Batko, E. Bauer, R.T. Khan, V.B. Filipov, E.S. Konovalova, Solid State Commun. 150, 652 (2010)

Identifiers

DOI

10.12693/APhysPolA.118.893