Low-Temperature Specific Heat and Magnetocaloric Effect in RCu_2Ge_2 (R = Dy-Tm) Compounds

• Authors: Ł. Gondek , D. Kaczorowski , A. Pikul , A. Szytuła
• Languages of publication: EN

Abstracts

EN

The magnetocaloric effect in RCu_2Ge_2 (R = Dy-Tm) was investigated by means of specific heat measurements. The compounds order antiferromagnetically at 6.2 K (DyCu_2Ge_2), 5.6 K (HoCu_2Ge_2), 3.0 K (ErCu_2Ge_2), and 3.9 K (TmCu_2Ge_2), and some of them exhibit additional magnetic transitions in the ordered state. In an external magnetic field the low-temperature specific heat changes significantly, which can be attributed to metamagnetic-like transitions. In this temperature region, the investigated samples show distinctly different magnetocaloric effect.

Keywords

EN

75.30.-m; 75.30.Sg; 75.40.Cx

Discipline

• 75.30.Sg: Magnetocaloric effect, magnetic cooling(for cryogenics, see 07.20.Mc)
• 75.40.Cx: Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)
• 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: 2012
• Volume: 122
• Issue: 2
• Pages: 391-393

Dates

published

2012-08

Contributors

author

Ł. Gondek

• Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Kraków, Poland

author

D. Kaczorowski

• W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław, Poland

author

A. Pikul

• W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław, Poland

author

A. Szytuła

• M. Smoluchowski Institute of Physics, Jagiellonian University, W.S. Reymonta 4, 30-059 Kraków, Poland

References

• 1. W. Rieger, E. Parthé, Monatshefte Chemie 100, 444 (1969)
• 2. Ł. Gondek, D. Kaczorowski, A.P. Pikul, A. Szytuła, Intermetallics 19, 964 (2011)
• 3. P. Schobinger-Papamanthellos, A. Niggli, P.A. Kotsanidis, J.K. Yakinthos, J. Phys. Chem. Solids 45, 695 (1984)
• 4. H. Pinto, M. Melamud, M. Kuznietz, H. Shaked, Phys. Rev. B 31, 508 (1985)
• 5. P.A. Kotsanidis, J.K. Yakinthos, E. Roudaut, Solid State Commun. 50, 413 (1984)
• 6. J.K. Yakinthos, J. Magn. Magn. Mater. 46, 300 (1985)
• 7. C. Song, D. Johnson, D. Wermeille, A.I. Goldman, S.L. Budko, L.R. Fisher, P.C. Canfield, Phys. Rev. B 64, 224414 (2001)
• 8. T. Shigeoka, M. Shiraishi, H. Mitamura, Y. Uwatoko, T. Fujiwara, T. Goto, Physica B 346-347, 112 (2004)
• 9. V.K. Pecharsky, K.A. Gschneidner, J. Appl. Phys. 86, 565 (1999)
• 10. V.K. Pecharsky, K.A. Gschneidner, A.O. Pecharsky, A.M. Tishin, Phys. Rev. B 64, 144406 (2001)
• 11. J.-D. Zou, B.-G. Shen, B. Gao, J. Shen, J.-R. Sun, Adv. Mater. 21, 693 (2009)
• 12. Ł. Gondek, A. Szytuła, D. Kaczorowski, A. Szewczyk, M. Gutowska, O. Prokhnenko, Intermetallics 15, 583 (2007)
• 13. A.M. Tishin, K.A. Gschneidner, V.K. Pecharsky, Phys. Rev. B 59, 503 (1999)

Identifiers

DOI

10.12693/APhysPolA.122.391