Mössbauer study of FeAlO layers obtained by ion-beam deposition and ion implanation

Thimon, F.; Marest, G.; Moncoffre, N.

doi:10.1016/0040-6090(94)90262-3

Cited by 5 publications

(1 citation statement)

References 18 publications

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“…5,6 Until now, the Fe-Al 2 O 3 system has already been studied in several basic aspects regarding phase formation, charge state of iron, diffusion, etc. Earlier papers investigated this system when mixed by ion implantation, [7][8][9][10][11][12][13][14][15] ion beam irradiation, [16][17][18] hot-pressing, 19 the sol-gel method, 20 and ball milling. 21,22 The magnetic properties of as-deposited and annealed Fe-Al 2 O 3 multilayers and of coevaporated granular Fe-Al 2 O 3 films have also been intensely investigated.…”

Section: Introductionmentioning

confidence: 99%

Structural and Mössbauer characterization of the ball-milledFex(Al2O3)100−x system

Paesano

Matsuda

Cótica

et al. 2004

Journal of Applied Physics

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Metal-oxide composites were synthesized by high-energy ball milling of metallic iron ͑␣-Fe͒ and alumina ͑␣-Al 2 O 3 ͒ powders, varying the starting relative concentration and the milling time. The samples were characterized by scanning electron microscopy, x-ray diffraction, and Mössbauer spectroscopy. The results revealed the formation of a FeAl 2 O 3+W spinel phase (hercynite) and of iron (super)paramagnetic nanoprecipitates, in addition to residual magnetic iron and alumina. We also observed that the relative amounts of nanoprecipitates and hercynite for isochronally milled samples were correlated with the sample nominal concentration x, with the precursor iron being relatively more converted in those phases for low x values. Particularly for x = 10 milled sample, the relative amounts of the (super)paramagnetic and spinel phases were observed to increase linearly with the milling time. An x = 20/ 24 h milled sample was annealed in H 2 atmosphere and revealed the reduction of hercynite, with iron phase separation.

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