The Microscopic Magnetic Properties of W-type Hexaferrite Powder Prepared by A Sol-Gel Route

Journal Article · Wed Dec 01 00:00:00 EST 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3530573· OSTI ID:21509983

Jotania, Rajshree; Chauhan, Chetna ^[1]; Sharma, Pooja ^[2]

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1. Material Science Research Laboratory, Department of Physics, University School of Sciences, Gujarat University, Ahmedabad 380 009 (India)
2. Department of Physics, Saurashtra University, Rajkot 360 005 (India)

Magnetic particles of W-type barium-calcium hexaferrite (BaCa{sub 2}Fe{sub 16}O{sub 27}) have been synthesized using a Stearic acid gel route. The gel precursors were dried at 100 deg. C for 2 hrs and then calcinated at 650 deg. C, 750 deg. C, 850 deg. C and 950 deg. C for 4 hrs in a furnace and slowly cooled to room temperature in order to obtain barium-calcium hexaferrite particles. The microscopic magnetic properties of prepared samples studying using Moessbauer spectroscopy. Moessbauer spectra of all samples were recorded at room temperature. Mossbauer parameters like Isomer shift, Quadruple splitting etc. were calculated with respect to iron foil. Barium calcium hexaferrite samples heated at 650 deg. C, 750 deg. C, 850 deg. C show relaxation type Moessbauer spectra along with paramagnetic doublet. The intensity of paramagnetic doublet increases with temperature confirm the presence of ferrous ions in the samples, where as sample calcinated at 950 deg. C confirm the presence of ferrimagnetic phase with partial super paramagnetic nature of prepared hexaferrite sample.

• OSTI ID: 21509983
• Journal Information: AIP Conference Proceedings, Vol. 1313, Issue 1; Conference: PEFM-2010: International conference on physics of emerging functional materials, Mumbai (India), 22-24 Sep 2010; Other Information: DOI: 10.1063/1.3530573; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM COMPOUNDS
CALCIUM COMPOUNDS
FERRITES
FOILS
GELS
IONS
IRON
ISOMER SHIFT
MAGNETIC PROPERTIES
MOESSBAUER EFFECT
OCTADECANOIC ACID
PARAMAGNETISM
PARTICLES
POWDERS
RELAXATION
SOL-GEL PROCESS
ZEEMAN EFFECT
ALKALINE EARTH METAL COMPOUNDS
CARBOXYLIC ACIDS
CHARGED PARTICLES
COLLOIDS
DISPERSIONS
ELEMENTS
FERRIMAGNETIC MATERIALS
IRON COMPOUNDS
MAGNETIC MATERIALS
MAGNETISM
MATERIALS
METALS
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS