Mössbauer studies of Co3O4; bulk material and ultrafine particles

Kündig, W.; Kobelt, M.; Appel, H.; Constabaris, G.; Lindquist, R.H.

doi:10.1016/0038-1098(68)90608-x

Cited by 2 publications

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“…It may be noticed that the same explanation applies t o the stabilization of Fe3+ ions formed after EC in Co,O, [9], for which the calculated value is AU = = 9.36 eV.…”

Section: Discussionmentioning

confidence: 70%

Mössbauer study of the valence state of ⁵⁷Fe after ⁵⁷Co decay in CoFe₂O₄

Cruset

Friedt

1971

Physica Status Solidi (b)

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The Mossbauer emission spectrum of s7Co in CoFe,O, is reported. Electron capture leads to the formation of 67FeS+ substituting S7Coa+. The stabilization of the aliovalent charge state is consistent with an electrostatic model.Le spectre d'6mission de 6 7 C~ dam CoFe,O, indique que la capture 6lectronique conduit B la formation de 57Fes+ en substitution de 57Coa+. La stabilisation de 1'6tat de charge aliovalent est expliqde selon un modble 6lectrostatique.

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“…It may be noticed that the same explanation applies t o the stabilization of Fe3+ ions formed after EC in Co,O, [9], for which the calculated value is AU = = 9.36 eV.…”

Section: Discussionmentioning

confidence: 70%

Mössbauer study of the valence state of ⁵⁷Fe after ⁵⁷Co decay in CoFe₂O₄

Cruset

Friedt

1971

Physica Status Solidi (b)

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“…2. Different experimental values of T, are found in the literature [l, 6,7]; the corresponding pairs of values for J1, J, are given in Table 3. Taking into account the experimental error on (h2m2) and our estimation of the accuracy of the GF prediction for TN, we propose Jl/kB = -(7.27 f 0.25) K , 1 J21/kB < 0*3 -Thus it can be concluded that Jz is a t most a few % of J1.…”

Section: Resultsmentioning

confidence: 99%

Magnetic Interactions in Co₃O₄

Scheerlinck

Hautecler²

1976

Physica Status Solidi (b)

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Co304 is a normal spinel with only A-A interactions which becomes antiferromagnetic a t T N = 40 K. The exchange integrals between one ion and its first and second neighbours are derived from the second moment of energy distributions of neutrons scattered by a polycrystalline sample in its paramagnetic state (156 K) and from a Green's function analysis of TN. The result, J J k B = -(7.27 f 0.25) K and IJ,l/lcB < 0.3 K, indicates that the interaction with the nearest neighbours is by far dominant. Co304 est un spinelle normal dam lequel les interactions magnetiques s'exercent seulement entre des ions situbs sur le sous-reseau A; il devient antiferromagnbtique h une temperature d'environ 40 K. Les valeurs des intbgrales d'bchange entre un ion et ses premiers et seconds voisins ont Btb obtenues du deuxihme moment de la distribution 6nergBtique des neutrons diffuses par un bchantillon polycristallin h une temperature de 155 K et d'une analyse theorique de T, au moyen du formalisme des fonctions de Green. Le rbsultat, J l / k~ = -(7,27 f 0,25) K et IJ,l/kB < 0,3 K, indique que les interactions entre les plus proches voisins sont de loin prbdominantes.

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Mössbauer studies of Co3O4; bulk material and ultrafine particles

Cited by 2 publications

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Mössbauer study of the valence state of ⁵⁷Fe after ⁵⁷Co decay in CoFe₂O₄

Mössbauer study of the valence state of ⁵⁷Fe after ⁵⁷Co decay in CoFe₂O₄

Magnetic Interactions in Co₃O₄

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Mössbauer studies of Co3O4; bulk material and ultrafine particles

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Mössbauer study of the valence state of 57Fe after 57Co decay in CoFe2O4

Mössbauer study of the valence state of 57Fe after 57Co decay in CoFe2O4

Magnetic Interactions in Co3O4

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Mössbauer study of the valence state of ⁵⁷Fe after ⁵⁷Co decay in CoFe₂O₄

Mössbauer study of the valence state of ⁵⁷Fe after ⁵⁷Co decay in CoFe₂O₄

Magnetic Interactions in Co₃O₄