Magnetic properties and large reversible magnetocaloric effect in TmMn2Si2

• Published in: Journal of alloys and compounds Vol. 582; pp. 670 - 673
• Main Authors: Li, Lingwei, Saensunon, Banchachit, Hutchison, Wayne D., Huo, Dexuan, Nishimura, Katsuhiko
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 05.01.2014; Elsevier
• Subjects: Active magnetic refrigeration materials; Alloys; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Entropy; Exact sciences and technology; Ferromagnetism; Heat capacity; Hysteresis; Magnetic phase transition; Magnetic properties; Magnetic properties and materials; Magnetically ordered materials: other intrinsic properties; Magnetization; Magnetocaloric effect; Magnetocaloric effect, magnetic cooling; Physics; Refrigeration; RMn2Si2 compounds; RMn2Si2 compounds; Magnetocaloric effect; Magnetic phase transition; Active magnetic refrigeration materials; Reversible processes; Magnetization; Intermetallic compounds; Magnetic transitions; Magnetic refrigerators; Specific heat; Silicon alloys; RMn; Magnetocaloric effects; Si; Manganese alloys; Thulium alloys; Rare earth alloys; compounds; Ferromagnetic-paramagnetic transitions; Transition element alloys
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2013.08.117

•Magnetic and magnetocaloric properties in TmMn2Si2 were studied.•A large reversible magnetocaloric effect in TmMn2Si2 was observed.•TmMn2Si2 could be a candidate for low temperature magnetic refrigeration. The magnetic properties and magnetocaloric effect (MCE) in the ternary intermetallic compound TmMn2Si2 have been studied via magnetization and heat capacity measurements. A large reversible MCE has been observed in TmMn2Si2 accompanied by a second order magnetic phase transition from paramagnetic to ferromagnetic at ∼5.5K. Under a field change of 5T, the maximum values of magnetic entropy change (-ΔSMmax) and adiabatic temperature change (ΔTadmax) are 22.7J/kgK and 10.1K, respectively, the corresponding relative cooling power (RCP) is 250J/kg. The large magnetic entropy change together with the absence of thermal and field hysteresis makes the TmMn2Si2 compound could be a good candidate for low temperature magnetic refrigeration.