Structure and magnetic properties of nanocrystalline CoLa0.08Fe1.92O4 ferrite
- 1. College of Chemistry, Jilin University, Changchun 130023 (China)
- 2. College of Physics, Jilin University, Changchun 130023 (China)
- 3. State Key Laboratory of Inorganic Synthesis and Prepartive Chemistry, Jilin University, Changchun 130023 (China)
Description
The magnetic properties of nanocrystalline CoLa0.08Fe1.92O4 powders prepared by the emulsion method at room temperature have been studied by vibrating sample magnetometer (VSM). The structure and specific surface area were studied by X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET). The particle size of the powders varied from 13.3 to 264.2nm by changing the calcinations temperatures and the corresponding specific saturation magnetization (σs) ranged from 48.8 to 78.4emu/g. On increasing the particle size, the coercivity (Hc) first increased, passed through a maximum and then dropped. At room temperature, the nanocrystalline CoLa0.08Fe1.92O4 powders with a crystallite size of 63.6nm achieved a desirable value of Hc=1.51kOe. A non-magnetic layer with the thickness of 1.1nm exists at the surface of the particles
Additional details
Identifiers
- DOI
- 10.1016/j.jmmm.2005.07.033;
- PII
- S0304-8853(05)00696-7;
Publishing Information
- Journal Title
- Journal of Magnetism and Magnetic Materials
- Journal Volume
- 301
- Journal Issue
- 2
- Journal Page Range
- p. 445-451
- ISSN
- 0304-8853
- CODEN
- JMMMDC
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37106572
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CALCINATION; COBALT COMPOUNDS; COERCIVE FORCE; CRYSTALS; FERRITES; LANTHANUM COMPOUNDS; LAYERS; MAGNETIC PROPERTIES; MAGNETIZATION; NANOSTRUCTURES; PARTICLE SIZE; SPECIFIC SURFACE AREA; SURFACES; TEMPERATURE RANGE 0273-0400 K; VIBRATING SAMPLE MAGNETOMETERS; X-RAY DIFFRACTION
- Descriptors DEC
- CHEMICAL REACTIONS; COHERENT SCATTERING; DECOMPOSITION; DIFFRACTION; FERRIMAGNETIC MATERIALS; IRON COMPOUNDS; MAGNETIC MATERIALS; MAGNETOMETERS; MATERIALS; MEASURING INSTRUMENTS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; PYROLYSIS; RARE EARTH COMPOUNDS; SCATTERING; SIZE; TEMPERATURE RANGE; THERMOCHEMICAL PROCESSES; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Copyright
- Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.