Investigation of the magnetocaloric effect in double distorted perovskites Ca(Cu3-xMnx)Mn4O12 (1 ≤ x ≤ 2): From standard ferrimagnetism to glassy ferrimagnetism - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2011

Investigation of the magnetocaloric effect in double distorted perovskites Ca(Cu3-xMnx)Mn4O12 (1 ≤ x ≤ 2): From standard ferrimagnetism to glassy ferrimagnetism

Résumé

The double distorted perovskites Ca(Cu3-xMnx)Mn4O12 (x = 1, 1.25, 1.5 and 2) exhibit a paramagnetic-to-ferrimagnetic transition at a temperature decreasing from TC = 280 K for x = 1 down to TC = 163 K for x = 2. In the latter compound, a reentrant-like spin-glass state emerges around Tg = 70 K. For each composition, the isothermal entropy change /DeltaSM was derived from magnetic measurements recorded up to 9 T. The obtained /DeltaSM(T) curves exhibit a broad and dissymmetric distribution, leading to high values of refrigerant capacity. The impact of the x value on the magnetic and magnetocaloric properties is addressed in detail, taking into account the various spin interactions present in these compounds.

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hal-00686816 , version 1 (11-04-2012)

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Q. Zhang, Yohann Bréard, François Guillou, Vincent Hardy. Investigation of the magnetocaloric effect in double distorted perovskites Ca(Cu3-xMnx)Mn4O12 (1 ≤ x ≤ 2): From standard ferrimagnetism to glassy ferrimagnetism. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2011, 84, pp.224430. ⟨10.1103/PhysRevB.84.224430⟩. ⟨hal-00686816⟩
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