Eu-based molybdate material, preparation method thereof and application thereof in extremely low temperature magnetic refrigeration material

Abstract

The application discloses a europium-based molybdate material, a preparation method thereof and application of the europium-based molybdate material in a very low temperature magnetic refrigeration material, and relates to the field of magnetic refrigeration materials. The chemical structural formula of the europium-based molybdate material is EuMoO4, the europium-based molybdate material has a secondary magnetic phase change below 1K temperature, and can be applied to preparation of a very low temperature magnetic refrigeration material. The europium-based molybdate material has a secondary magnetic phase change under the condition of 1K temperature, and the volume magnetic entropy change of the europium-based molybdate material under a low magnetic field is obviously higher than the maximum volume magnetic entropy change of an existing magnetic refrigeration material under the same magnetic field change, so that the europium-based molybdate material is a very low temperature magnetic refrigeration material with excellent performance. The europium-based molybdate material is synthesized by using a solid phase reaction method, the preparation process is simple, energy consumption is low, and the europium-based molybdate material is suitable for large-scale industrial production.

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