Scaling analysis of phase transitions in magnetocaloric alloys

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:499

Article

Gozdur, Roman¹  Najgebauer, Mariusz² 

[1] Lodz Univ Technol, Dept Semicond & Optoelect Devices, Ul Wolczanska 211-215, PL-90924 Lodz, Poland

[2] Czestochowa Tech Univ, Fac Elect Engn, Al Armii Krajowej 17, PL-42200 Czestochowa, Poland

关键词: Magnetocaloric materials;    Phase transitions;    Scaling analysis;    Magnetic power loss;   

DOI  :  10.1016/j.jmmm.2019.166239

来源: Elsevier

【 摘 要 】

The paper presents magnetization measurements and the scaling analysis of related power loss for a high-temperature magnetocaloric alloy (T-C = 330 K). The measured hysteresis loops show anomalous behaviour near the temperature of 315 K, which may indicate the occurrence of additional phase transition. Power losses measured in different temperatures are analyzed using the scaling theory in order to determine the universal curves and the scaling exponents. The temperature dependence of scaling exponents confirms the existence of another phase transition at the temperature of 315 K, associated with an additional metallic phase in the alloy.

【 授权许可】

Free