Experimental Study of Magnetic Properties of Alumina Ceramics

• Authors: R. Tarasenko , A. Orendáčová , M. Orendáč , M. Kajňaková , A. Feher
• Languages of publication: EN

Abstracts

EN

Magnetic properties of alumina ceramics were studied within a program focused at design of microcalorimeters and experimental setup for specific heat and magnetocaloric measurements. The investigations were concentrated on the determination of amount of magnetic impurities that can significantly influence results of physical measurements at low temperatures. Our experimental studies of heat capacity, susceptibility and magnetization clearly indicate that alumina ceramics contains magnetic impurities, primarily ions with spin 5/2. The average concentration of magnetic ions was estimated, n ≈ 2000 ppm. More details of analysis of experimental data are discussed in the paper.

Keywords

EN

75.20.-g; 75.60.Ej; 75.40.-s

Discipline

• 75.20.-g: Diamagnetism, paramagnetism, and superparamagnetism
• 75.60.Ej: Magnetization curves, hysteresis, Barkhausen and related effects(for hysteresis in ferroelectricity, see 77.80.Dj)
• 75.40.-s: Critical-point effects, specific heats, short-range order(for equilibrium properties near critical points, see 64.60.F-; for dynamical critical phenomena, see 64.60.Ht)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 5
• Pages: 1067-1068

Dates

published

2010-11

Contributors

author

R. Tarasenko

• Centre of Low Temperature Physics of SAS and P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovak Republic

author

A. Orendáčová

• Centre of Low Temperature Physics of SAS and P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovak Republic

author

M. Orendáč

• Centre of Low Temperature Physics of SAS and P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovak Republic

author

M. Kajňaková

• Centre of Low Temperature Physics of SAS and P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovak Republic

author

A. Feher

• Centre of Low Temperature Physics of SAS and P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovak Republic

References

• 1. F. Pobell, Matter and Methods at Low Temperatures, Springer-Verlag, New York 1992
• 2. http://www.dynacer.com
• 3. Ya.E. Volokitin, R.C. Thiel, L.J. de Jongh, Cryogenics 34, 771 (1994)
• 4. R. Boča, Coord. Chem. Rev. 248, 757 (2004)

Identifiers

DOI

10.12693/APhysPolA.118.1067