基于具有六方结构磁铅石的极多取代磁性材料：合成、结构、性质及前景

Extremely Polysubstituted Magnetic Material Based on Magnetoplumbite with a Hexagonal Structure: Synthesis, Structure, Properties, Prospects.

作者信息

Vinnik Denis A, Zhivulin Vladimir E, Trofimov Evgeny A, Starikov Andrey Y, Zherebtsov Dmitry A, Zaitseva Olga V, Gudkova Svetlana A, Taskaev Sergey V, Klygach Denis S, Vakhitov Maxim G, Sander Elena E, Sherstyuk Darya P, Trukhanov Alexey V

机构信息

South Ural State University (National Research University), 454080 Chelyabinsk, Russia.

Moscow Institute of Physics and Technology (State University), 141701 Dolgoprudny, Russia.

出版信息

Nanomaterials (Basel). 2019 Apr 6;9(4):559. doi: 10.3390/nano9040559.

DOI:10.3390/nano9040559

PMID:30959914

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6523146/

Abstract

Crystalline high-entropy single-phase products with a magnetoplumbite structure with grains in the μm range were obtained using solid-state sintering. The synthesis temperature was up to 1400 °C. The morphology, chemical composition, crystal structure, magnetic, and electrodynamic properties were studied and compared with pure barium hexaferrite BaFeO matrix. The polysubstituted high-entropy single-phase product contains five doping elements at a high concentration level. According to the EDX data, the new compound has a formula of Ba(Fe₆GaInTiCrCo)O. The calculated cell parameter values were = 5.9253(5) Å, = 23.5257(22) Å, and = 715.32(9) Å³. The increase in the unit cell for the substituted sample was expected due to the different ionic radius of Ti/In/Ga/Cr/Co compared with Fe. The electrodynamic measurements were performed. The dielectric and magnetic permeabilities were stable in the frequency range from 2 to 12 GHz. In this frequency range, the dielectric and magnetic losses were -0.2/0.2. Due to these electrodynamic parameters, this material can be used in the design of microwave strip devices.

摘要

通过固态烧结获得了具有磁铅石结构、晶粒尺寸在微米范围内的晶体高熵单相产物。合成温度高达1400℃。对其形貌、化学成分、晶体结构、磁性和电动力学性质进行了研究，并与纯六方铁酸钡BaFeO基体进行了比较。该多取代高熵单相产物含有五种高浓度掺杂元素。根据能谱数据，新化合物的化学式为Ba(Fe₆GaInTiCrCo)O。计算得到的晶胞参数值为 = 5.9253(5) Å， = 23.5257(22) Å， = 715.32(9) Å³。由于Ti/In/Ga/Cr/Co与Fe的离子半径不同，预计取代样品的晶胞会增大。进行了电动力学测量。在2至12 GHz频率范围内，介电常数和磁导率稳定。在此频率范围内，介电损耗和磁损耗为 -0.2/0.2。由于这些电动力学参数，这种材料可用于微波带状器件的设计。