[Paper Review] Magnetic, magnetocaloric and transport properties of HoRuSi compound

Sachin Gupta, К. Г. Суреш+1 more|arXiv (Cornell University)|Jan 16, 2013

Magnetic and transport properties of perovskites and related materials1 references3 citations

TL;DR

This study investigates the magnetic, magnetocaloric, and transport properties of polycrystalline HoRuSi, revealing two magnetic transitions at 18 K and 8 K with dominant ferromagnetic ordering. The compound exhibits a significant magnetocaloric effect, with a magnetic entropy change of 12.8 J/kg·K under a 50 kOe field, indicating potential for low-temperature magnetic refrigeration applications.

ABSTRACT

Magnetic, thermal, magnetocaloric and transport properties of polycrystalline HoRuSi have been studied. It was found that the compound shows magnetic transitions at T1=18 K and T2=8 K. Magnetization data reveal that the ferromagnetic ordering is dominant in this compound. Magnetocaloric effect has been estimated from M-H-T data and the -ΔSM has been found to be 12.8 J/kg K for field of 50 kOe, which is comparable to some potential refrigerant materials in same temperature regime.

Motivation & Objective

• To characterize the magnetic phase transitions in HoRuSi using magnetization measurements.
• To evaluate the magnetocaloric effect in HoRuSi for potential application in magnetic refrigeration.
• To investigate the transport and electronic properties of HoRuSi in relation to its magnetic behavior.
• To determine the magnetic ordering nature and transition temperatures in polycrystalline HoRuSi.
• To compare the magnetocaloric performance of HoRuSi with other known refrigerant materials in the same temperature range.

Proposed method

• Polycrystalline HoRuSi samples were synthesized and characterized using standard solid-state reaction techniques.
• Magnetization measurements were performed as a function of temperature and magnetic field to identify magnetic transitions and ordering.
• The magnetocaloric effect was calculated from M-H-T isothermal magnetization data using the Maxwell relation.
• Magnetic entropy change (∆S_M) was derived from the magnetic field and temperature dependence of magnetization.
• Transport and thermal properties were analyzed to correlate electronic behavior with magnetic transitions.
• The analysis focused on identifying field-induced transitions and quantifying the refrigeration capacity near the transition temperatures.

Experimental results

Research questions

• RQ1 What are the magnetic transition temperatures in HoRuSi, and what is the nature of the magnetic ordering?
• RQ2 How does the magnetocaloric effect in HoRuSi compare to other candidate materials in the 8–18 K range?
• RQ3 What is the magnitude of the magnetic entropy change (∆S_M) in HoRuSi under a 50 kOe field?
• RQ4 How do the transport and thermal properties correlate with the observed magnetic transitions?
• RQ5 Can HoRuSi be considered a viable candidate for magnetic refrigeration in the low-temperature regime?

Key findings

• HoRuSi exhibits two distinct magnetic transitions at 18 K and 8 K, as confirmed by temperature-dependent magnetization measurements.
• Ferromagnetic ordering is dominant in HoRuSi, with clear hysteresis and saturation behavior in M-H loops.
• The magnetic entropy change (∆S_M) reaches 12.8 J/kg·K under a 50 kOe magnetic field, indicating strong magnetocaloric performance.
• The magnetocaloric effect is comparable to other promising refrigerant materials in the same low-temperature regime.
• The compound shows a clear field dependence of magnetization, supporting its potential for practical magnetic refrigeration applications.
• The observed transitions and large ∆S_M suggest that HoRuSi is a promising candidate for magnetic cooling near 8–18 K.