Influence of Pressure on Magnetic Properties of La_{1-x} Sr_xCoO_{3-δ}(x=0.5, 0.67, 1)

• Authors: J Piętosa , A Wiśniewski , R Puźniak , S Kolesnik , M Majjiga , B Dabrowski
• Languages of publication: EN

Abstracts

EN

Influence of pressure on the phase transition temperature T_C and on the spontaneous magnetisation M_{0} of highly Sr substituted and oxygen nonstoichiometric La_{1-x}Sr_xCoO_{3-δ} samples was investigated. An increase in T_C and M_0 with pressure in investigated samples was found, indicating strengthening of ferromagnetic double exchange interactions, and the expansion of volume of ferromagnetic phase as a~result of enhancement in ferromagnetic interactions in both cluster-glass and long range ferromagnetic states. We did not observe clear correlation between changes in pressure coefficient dT_C/dP and changes in the formal oxidation state of the Co ion.

Keywords

EN

75.30.-m; 75.47.Gk; 75.30.Kz

Discipline

• 75.47.Gk: Colossal magnetoresistance
• 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)
• 75.30.-m: Intrinsic properties of magnetically ordered materials(for critical point effects, see 75.40.-s; for magnetotransport phenomena, see 75.47.-m)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2006
• Volume: 109
• Issue: 4-5
• Pages: 527-532

Dates

published

2006-04

received

2005-09-25

Contributors

author

J Piętosa

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

A Wiśniewski

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

R Puźniak

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

S Kolesnik

• Physics Department, Northern Illinois University, De Kalb, IL 60115, USA

author

M Majjiga

• Physics Department, Northern Illinois University, De Kalb, IL 60115, USA

author

B Dabrowski

• Physics Department, Northern Illinois University, De Kalb, IL 60115, USA

References

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Identifiers

DOI

10.12693/APhysPolA.109.527