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Cryogenic magnetocaloric effect in a disordered double-perovskite Gd2MnZnO6
Dimitar N Petrov1, J Ćwik2, Yu S Koshkid'ko2
1Department of Physical Chemistry, Plovdiv University "Paisii Hilendarski" 24, Tsar Asen Str. 4000 Plovdiv Bulgaria.
RSC Advances
|May 28, 2026
Summary
Researchers investigated Gd2MnZnO6 for cryogenic magnetic refrigeration. This disordered double-perovskite shows promising magnetocaloric (MC) properties, including a 2.6 K temperature change and significant entropy change.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Magnetism
Background:
- The development of efficient magnetic refrigeration materials is crucial for energy-efficient cooling technologies.
- Disordered double-perovskites offer tunable magnetic properties for advanced applications.
Purpose of the Study:
- To characterize the structural and magnetic properties of Gd2MnZnO6.
- To evaluate its magnetocaloric (MC) effect for cryogenic applications.
- To understand the magnetic interactions influencing its MC performance.
Main Methods:
- Solid-state reaction method for material synthesis.
- Powder X-ray diffraction for structural analysis.
- Magnetic measurements (M(T, H)) to assess magnetic behavior and MC effect.
- Calorimetric measurements (Cp) to determine heat capacity.
Main Results:
- Gd2MnZnO6 crystallizes in an orthorhombic structure (Pnma space group).
- Under a 40 kOe field, an adiabatic temperature change (ΔTad) of ~2.6 K was observed.
- A maximum magnetic entropy change (|ΔSm|) of 19 J kg−1 K−1 and RCP of 331 J kg−1 were achieved for a 90 kOe field change.
- Evidence of short-range magnetic order due to competing ferromagnetic and antiferromagnetic interactions.
Conclusions:
- Gd2MnZnO6 exhibits significant magnetocaloric properties, making it a strong candidate for cryogenic magnetic refrigeration.
- The material's performance is linked to its structural characteristics and complex magnetic interactions.
- Further research into optimizing disordered perovskites could lead to enhanced cooling technologies.
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