Substitution for Iron in Ferrimagnetic Yttrium-Iron Garnet

Journal Article · Wed Jan 01 04:00:00 EST 1958 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1723143· OSTI ID:4343503

Gilleo, M. A.; Geller, S.

In yttrium--iron garnet, iron may be entirely replaced by aluminum and galliums chromium, scandium, and indium may be substituted for iron to a limited extent. Substitution proceeds on a steric basis for the nonmagnetic ions: Al³⁺ and Ga³⁺ , which are smaller than Fe³⁺ , preferentially occupy the smaller, tetrahedrally coordinated positions, 24(d); the Sc³⁺ and In³⁺ ions, which are iarger than Fe³⁺ , preferentialiy occupy the larger, octahedrally coordinated positions, 16(a). The Cr³⁺ ion, though smaller than Fe³⁺ , preferentially occupies the octahedral position, presumably because of its electronic configuration. The magnetic moment initially increases with octahedral substitution and decreases with tetrahedral substitution. The Curie temperature is decreased by the substitation of nonmagnetic ions for iron as a consequence of the decrease in the number of Fe³⁺ -O^2- -Fe³⁺ interactions.

• Research Organization: Bell Telephone Labs., Inc., Murry Hill, N.J.
• Sponsoring Organization: USDOE
• NSA Number: NSA-12-008185
• OSTI ID: 4343503
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 3 Vol. 29; ISSN JAPIAU; ISSN 0021-8979
• Publisher: American Institute of Physics (AIP)
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOTROPY
ALUMINUM
ALUMINUM SILICATES
ATOMIC MODELS
CHROMIUM
CRYSTALS
CURIE POINT
ELECTRONS
FERROMAGNETIC MATERIALS
GALLIUM
GARNETS
INDIUM
INTERACTIONS
IRON OXIDES
LATTICES
MAGNETIC MOMENTS
MAGNETISM
MINERALS
SCANDIUM
TEMPERATURE
YTTRIUM OXIDES