Preparation of γ-Iron Ultrafine Particles Using a Transversely Excited Atmospheric CO2 Laser
- 1 February 1994
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 33 (2B) , L223-226
- https://doi.org/10.1143/jjap.33.l223
Abstract
γ-Iron ultrafine particles which are stable at room temperature have been prepared in a high yield of maximum 90% by the SF6-sensitized infrared photodecomposition of Fe(CO)5 using a transversely excited atmospheric (TEA) CO2 laser. The obtained γ-iron particles are isotropic in shape, having an uniform size of 6.5–8.5 nm with a mean size of 7.6 nm and fcc structure, and are paramagnetic at 1.8–295 K The paramagnetic fcc γ-iron particles begin to transform into ferromagnetic bcc α-iron above 473 K with almost complete conversion to α-iron at 653–693 K.Keywords
This publication has 10 references indexed in Scilit:
- Low-temperature stable nanometer-size fcc-Fe particles with no magnetic orderingPhysical Review B, 1992
- Magnetic Ordering of fcc Fe Small ParticlesJapanese Journal of Applied Physics, 1990
- Preparation of ultrafine γ-Fe particles by microwave plasma processingJournal of Crystal Growth, 1990
- Sulfur hexafluoride sensitized infrared photodecomposition of iron pentacarbonylJournal of the American Chemical Society, 1989
- Preparation of Free γ-Iron Particles Quenched to Room TemperatureJapanese Journal of Applied Physics, 1986
- Mössbauer study of Fe-oxide surface layers formed on small Fe particlesSurface Science, 1978
- Ferromagnetism in γ-ironSolid State Communications, 1977
- Particles of γ-Iron Quenched at Room TemperatureJapanese Journal of Applied Physics, 1974
- Determination of Néel Temperatures in fcc IronJournal of Applied Physics, 1963
- Neutron Diffraction Determination of Antiferromagnetism in Face-Centered Cubic () IronPhysical Review B, 1962