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

A molecular magnet, double-functional technology, applied in the field of dysprosium single-molecule magnet and its preparation

Inactive Publication Date: 2011-07-27
NANKAI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, single-molecule magnet materials with two properties of two rela

Method used

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

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Experimental program
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Embodiment

[0017] 228.3mg of Dy(NO 3 ) 3 ·6H 2 O, 273mg of L was mixed in a container, then added 20mL of ethanol, adjusted the pH value to 7 with LiOH, stirred at room temperature for 2h; then baked in an oven at 100°C for 72h, took out the product, and separated the solid . Then washed with ethanol 3 times to obtain colorless strip crystals. The calculated yield based on metal Dy was 63%.

[0018] Characterization of the dysprosium single-molecule magnet:

[0019] 1) Structure determination of the dysprosium single-molecule magnet:

[0020] The crystal structure was determined using a Supernova type X-ray single crystal diffractometer, using graphite monochromatized Mo-K α Rays is the incident radiation source, with The diffraction points were collected by scanning, and the unit cell parameters were corrected by the least square method. The crystal structure was solved by the SHELXL-97 direct method from the difference Fourier electron density map, and corrected by Lorentz an...

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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...

Claims

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Application Information

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IPC IPC(8): H01F7/00C07F5/00H01F41/02
Inventor 程鹏王玉霞师唯耿志帅
Owner NANKAI UNIV
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