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Title: Investigation of the crystal and magnetic structures of BaFe{sub 12-x}Al{sub x}O{sub 19} solid solutions (x = 0.1‒1.2)

The structure of barium ferrite BaFe{sub 12-x}Al{sub x}O{sub 19} solid solutions (x = 0.1‒1.2) with iron partially replaced with diamagnetic aluminum ions has been studied by neutron diffraction. Experimental data have been collected at room temperature on a high-resolution diffractometer, which yielded precise information about the changes in the crystal and magnetic structures and data on the behavior of the sample microstructure. Barium hexaferrite retains a magnetoplumbite structure in the entire range of aluminum concentrations under study, and its magnetic structure is described within the Gorter model, with moments orientated along the hexagonal axis. The total magnetic moment per formula unit decreases while diamagnetic aluminum ions substitute for iron ions. Microstrains in crystallites increase with an increase in the diamagnetic ion concentration, which is related to the difference in the ionic radii of iron and aluminum ions.
Authors:
 [1] ;  [2] ;  [1] ;  [2] ;  [1]
  1. Joint Institute for Nuclear Research (Russian Federation)
  2. National Academy of Sciences of Belarus, Scientific and Practical Materials Research Centre (Belarus)
Publication Date:
OSTI Identifier:
22472156
Resource Type:
Journal Article
Resource Relation:
Journal Name: Crystallography Reports; Journal Volume: 60; Journal Issue: 5; Other Information: Copyright (c) 2015 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM COMPOUNDS; ALUMINIUM IONS; BARIUM COMPOUNDS; CONCENTRATION RATIO; CRYSTALS; DIAMAGNETISM; FERRITES; IRON; IRON IONS; MAGNETIC MOMENTS; MICROSTRUCTURE; NEUTRON DIFFRACTION; SOLID SOLUTIONS; TEMPERATURE RANGE 0273-0400 K