2018/05/05 by Moumita Das, M. Das, S. Roy +2
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Chemistry #Condensed matter physics #Crystallography #Frustration #Magnetic and transport properties of perovskites and related materials #Magnetic field #Magnetic refrigeration #Magnetization #Materials science #Multiferroics and related materials #Physics #Quantum mechanics #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.98.104420
published as Phys. Rev. B 98, 104420 (2018) · 8 pages, 12 figures
arxiv created 2018/05/05 · openalex created_date 2018/05/17 · openalex publication_date 2018/09/17 · arxiv updated 2018/09/26 · openalex updated_date 2026/08/05
We report the role of exchange frustration on the magnetocaloric properties of GdCrTiO5. Due to the highly frustrated nature of magnetic interactions, in GdCrTiO5, the long-range antiferromagnetic ordering of Gd3+ moments occurs at a much lower temperature TN=0.9 K and the magnetic cooling power enhances dramatically relative to that observed in several geometrically frustrated systems. Below 5 K, the isothermal magnetic entropy change (\ensuremath-\mathrm\ensuremathΔSm) is found to be 36 J kg^\ensuremath-1\phantom\rule0.16em0exK^\ensuremath-1 for a field change (\mathrm\ensuremathΔH) of 7 T. \ensuremath-\mathrm\ensuremathΔSm shows saturationlike behavior with decreasing T down to 2 K and is reversible in nature. The adiabatic temperature change \mathrm\ensuremathΔTad is 15.5 K for \mathrm\ensuremathΔH=7 T. These magnetocaloric parameters are significantly larger than that reported for several potential magnetic refrigerants, even for small and moderate field changes. The present result not only suggests that GdCrTiO5 could be considered as a potential magnetic refrigerant at cryogenic temperatures but also promotes further studies on the role of exchange frustration on the magnetocaloric effect. In contrast, only the role of geometrical frustration on the magnetocaloric effect has been previously reported theoretically and experimentally investigated on very few systems.