ACTA

Magnetic Systems at Criticality: Different Signatures of Scaling

R. Pełka^a, P. Konieczny^a, M. Fitta^a, M. Czapla^a, P.M. Zieliński^a, M. Bałanda^a, T. Wasiutyński^a, Y. Miyazaki^b, A. Inaba^b, D. Pinkowicz^c and B. Sieklucka^c
^aThe H. Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, E. Radzikowskiego 152, 31-342 Kraków, Poland
^bResearch Center for Structural Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
^cFaculty of Chemistry, Jagiellonian University, R. Ingardena 3, 30-060 Kraków, Poland

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Different aspects of critical behaviour of magnetic materials are presented and discussed. The scaling ideas are shown to arise in the context of purely magnetic properties as well as in that of thermal properties as demonstrated by magnetocaloric effect or combined scaling of excess entropy and order parameter. Two non-standard approaches to scaling phenomena are described. The presented concepts are exemplified by experimental data gathered on four representatives of molecular magnets.

DOI: 10.12693/APhysPolA.124.977
PACS numbers: 75.40.-s, 75.30.Kz, 75.30.Sg, 75.50.Xx