Magnetic and Transport Properties of La_{0.67}Pb_{0.33}(Mn_{1-x}Co_x)O_3

• Authors: M. Mihalik , V. Kavečanský , S. Maťaš , M. Zentková , J. Ammer , K. Kellner , G. Gritzner
• Languages of publication: EN

Abstracts

EN

Detailed studies of temperature dependences of magnetization, AC susceptibility and electrical resistance were performed on La_{0.67}Pb_{0.33}(Mn_{1-x}Co_x)O_3 ceramics with x = 0.01 and 0.1. Typical features of both compounds are the hysteretic behavior between the zero-field-cooled magnetization regime and the field-cooled magnetization regime, a very weak field dependence of a maximum in zero-field-cooled magnetization and practically no frequency dependence of the peak in AC susceptibility χ"(T). Anomalies in the electrical resistance connected with the ferromagnetic transition at T_C, the insulator-metal transitions at T_p and the re-entrant metal-isolator transition at T* are field dependent pointing to magnetic origin of these transitions. Colossal magnetoresistance was observed in both compounds.

Keywords

EN

71.30.+h; 72.80.Ga; 75.20.Hr; 75.30.Et; 75.30.Vn

Discipline

• 75.30.Et: Exchange and superexchange interactions(see also 71.70.Gm Exchange interactions)
• 71.30.+h: Metal-insulator transitions and other electronic transitions
• 72.80.Ga: Transition-metal compounds
• 75.20.Hr: Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions(for Kondo effect and scattering mechanisms in electronic conduction, see 72.15.Qm and 72.10.Fk)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 1
• Pages: 251-254

Dates

published

2008-01

received

2007-07-09

Contributors

author

M. Mihalik

• Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovak Republic

author

V. Kavečanský

• Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovak Republic

author

S. Maťaš

• Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovak Republic

author

M. Zentková

• Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovak Republic

author

J. Ammer

• Institute for Chemical Technology of Inorganic Materials, Johannes Kepler University, Altenbergerstrasse 69, 4040 Linz, Austria

author

K. Kellner

• Institute for Chemical Technology of Inorganic Materials, Johannes Kepler University, Altenbergerstrasse 69, 4040 Linz, Austria

author

G. Gritzner

• Institute for Chemical Technology of Inorganic Materials, Johannes Kepler University, Altenbergerstrasse 69, 4040 Linz, Austria

References

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• 4. G. Gritzner, M. Koppe, K. Kellner, J. Przewoznik, J. Chmist, A. Kolodziejczyk, K. Krop, Appl. Phys. A 81, 1491 (2005)
• 5. J. Przewoźnik, J. Przewoźnik, J.Żukrowski, J. Chmist, Z. Tarnawski, A. Kołodziejczyk, K. Krop, K. Kellner, G. Gritzner, Phys. Status Solidi C 3, 138 (2006)
• 6. G. Gritzner, A. Pissenberger, Appl. Phys. A 87, 807 (2007)

Identifiers

DOI

10.12693/APhysPolA.113.251