Dysprosium monomer magnet with dual functions of ferromagnetic and ferroelectric and preparation method thereof

Abstract

The invention discloses a dysprosium monomer magnet with the dual functions of ferromagnetic and ferroelectric, the chemical formula of which is represented as [Dy3(L)2(NO3)4].EtOH, wherein L is N, N, N', N'-tetrahydroxyethyl-ethylene diamine; and EtOH is ethanol. Three Dy atoms of different coordination environments exist in the dysprosium monomer magnet and form an unclosed triangle three-core Dy structure; a preparation method of the dysprosium monomer magnet is as follows: dysprosium nitrate hexahydrate is used as metal salt; L is used as a ligand, and LiOH is used as an alkaline substance to adjust the pH value to 7; and a mixed liquid is prepared by stirring, baking, separating and washing solids. The invention has the advantages that: the dysprosium monomer magnet not only shows rare dual relaxation monomer magnet behaviors, but also shows excellent ferroelectric properties; therefore, the material has high potential using values in solid devices like nanometer devices, low-temperature high-density storage devices, ferroelectric memorizers, infrared detectors, surface acoustic waves, and integrated ferroelectric devices, etc.

Description

【Technical field】

[0001] The invention relates to a ferroelectric and ferromagnetic dual-functional material, in particular to a dysprosium single-molecule magnet with ferromagnetic and ferroelectric dual functions and a preparation method thereof. 【Background technique】

[0002] Single-molecular magnets (Single-Molecular Magnets, SMMs) are new materials between molecular-based magnets and nano-magnetic materials. Gatteschi D equaled the discovery of the first single-molecule magnet in 1993 [Mn 12 o 12 (OCMe) 16 (H 2 O) 4 ], opening up a new field of magnetism (Sessoli R et al., Nature, 1993, 365; Gatteschi D et al., Science, 1994, 265). With the development of science in recent years, single-molecule magnets have attracted more and more attention from many scientists at home and abroad. It has superparamagnetic phenomenon at low temperature, and the study of its unusual magnetic properties not only contributes to the development of nanomagnetic ion physics and chemist...

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