Inverse magnetocaloric effect and the magnetostructural transition in Pr0.15Ca0.85MnO3 manganite

Авторы: Kavipriya Thangavel, Morozkin A.V., Murthy V.R.K, Rayaprol S., Pöppl Andreas, Nirmala R.
Журнал: Magnetics, IEEE Transactions on
Том: 58
Номер: 2
Год издания: 2022
Первая страница: 2500806-1
Последняя страница: 2500806-2
Номер статьи: 2500806
DOI: 10.1109/TMAG.2021.3092644
Аннотация: Magnetic and magnetocaloric properties of electron-doped Pr0.15Ca0.85MnO3 (orthorhombic, Pnma, oP20) manganite have been studied. Low field magnetization measurements suggest that the sample orders antiferromagnetically at 147 K (TN). Magnetocaloric effect (MCE) has been estimated in terms of isothermal magnetic entropy change (ΔSm) and the maximum ΔSm value is about 6.4 Jkg-1K-1 at 137.5 K for 70 kOe field change. Low temperature powder X-ray diffraction studies reveal a change from orthorhombic (space group Pnma, no. 62) crystal structure to monoclinic (space group P21/m, no. 11-2, mP20) structure below 140 K. The inverse magnetocaloric effect shows a maximum value around the magnetostructural transition temperature. Electrical resistivity and EPR spectroscopy results reveal hopping conduction in the paramagnetic state.
Добавил в систему: Морозкин Александр Владимирович

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