6533b820fe1ef96bd1279c89

RESEARCH PRODUCT

Mossbauer study on the distribution of iron in high coercivity chromium dioxide particles

Philipp GütlichE. SchwabJürgen EnslingW. MeiselH. JachowR. Klinger

subject

Valence (chemistry)Materials scienceCondensed matter physicsMössbauer effectAnalytical chemistrychemistry.chemical_elementCrystal structureCoercivityMagnetocrystalline anisotropyElectronic Optical and Magnetic MaterialsChromiumMagnetic anisotropychemistryMössbauer spectroscopyElectrical and Electronic Engineering

description

/sup 57/Fe Mossbauer spectroscopy is applied to determine the level of iron doping in high-coercivity CrO/sub 2/ particles. It is found that, compared with the conventional preparation process, the particles contain an increased amount of Fe/sup 3+/ ions in the CrO/sub 2/ crystal lattice, giving rise to higher magnetocrystalline anisotropy. This is reflected in coercivities up to over 900 Oe. All samples contain as a secondary iron-containing phase some (Cr/sub 1-x/Fe/sub x/)/sub 2/O/sub 3/. The valence of the iron doping is predominantly +3; very weak signals in the Mossbauer spectra suggest the existence of Fe/sup 4+/ in an amount 2-3% of the total number of iron atoms. >

yearjournalcountryeditionlanguage
1992-09-01IEEE Transactions on Magnetics
https://doi.org/10.1109/20.179595