Showing papers on "Spin canting published in 1972"
TL;DR: In this article, the Dzyaloshinsky theory for spin configurations in the rhombohedral weak ferromagnet α•Fe2O3 has been experimentally observed for the first time using a rotating sample magnetometer.
Abstract: The Dzyaloshinsky theory for spin configurations in the rhombohedral weak ferromagnet α‐Fe2O3 predicts above the Morin transition temperature a very small c‐axis magnetic moment Mc having a threefold symmetry. This property has been experimentally observed for the first time using a rotating sample magnetometer. Mc is found to vary as AMs cos3Ψ when a saturating field rotates through an angle Ψ in the basal plane, being equal to zero when the field is along any of the three twofold axes. For 11 α‐Fe2O3 crystals the average value of A is 1.15±0.4×10−3 with Ms equal to the weak spontaneous moment in the basal plane. Since a canting angle for the spins in the basal plane of 10−4 rad will produce Ms, a spin canting toward c of only 10−7 rad can account for Mc.
15 citations
TL;DR: In this article, the difference in the magnetic behaviors with regard to the AB and BB interactions can be explained on the basis of the magnetic exchange theory, and the difference between magnetic interactions in spinel structure with the formula ZnxMe2−xO4−xFx (M = Fe, Co, Ni) is explained.
Abstract: Wahrend in dem Spinell ZnFe[Fe2+Fe3+]O4-xFx (0 ≤ x ≤ 0,50) die ferromagnetische Anordnung der Momente der Kationen des Untergitters B bei einer Substitution von Fe3+ durch Zn2+ nicht verandert wird, bedingt diese Substitution fur die Kationen B in den Spinellen ZnFe[Co2+Fe3+]O4-xFx und ZnFe[Ni2+Fe3+]O4-xFx (0 ≤ x ≤ 0,80) eine magnetische Struktur vom Typ „spin canting”. Dieser Unterschied im magnetischen Verhalten der drei Spinell-Vertreter kann auf der Grundlage der Theorie der Austauschwechselwirkungen erklart werden.
Magnetic interactions in some oxyfluoroferrites of spinel structure with the formula ZnxMe2−xO4−xFx (M = Fe, Co, Ni)
Whereas the ferromagnetic spin arrangement of the B-cations is not modified by the Zn2+−Fe3+ substitution in the ZnFe[Fe2+Fe3+]O4−xFx (0 ≤ x ≤ 0,50) spinel, this same substitution leads to a spin canting in the ZnFe[Co2+Fe3+]O4−xFx and ZnFe[Ni2+Fe3+]O4−xFx (0 ≤ x ≤ 0,80) simples. The difference in the magnetic behaviors with regard to the AB and BB interactions can be explained on the basis of the magnetic exchange theory.
8 citations
TL;DR: In this paper, the spinel structure of the oxyfluoride phases Zn x MFe 2− x O 4− x F x (M = Co, Ni and 0 ⩽ x ⩾ 080) with the spinels structure have been prepared by substitution in the CoFe 2O 4 and NiFe 2 O 4 ferrites of oxygen by fluorine, ensuring charge compensation by the replacement of an equivalent amount of iron +III by zinc.
4 citations
TL;DR: In this article, the spin canting of Fe3+ ions induced by strong anisotropic ions such as 4d and 5d transition metal ions in yttrium-iron-garnet has been calculated in a simple classical model.
Abstract: The spin canting of Fe3+ ions induced by strong anisotropic ions such as 4d and 5d transition‐metal ions in yttrium‐iron‐garnet has been calculated in a simple classical model. Strong deviations of the spins of the nearest neighbors from the direction of the average magnetization can occur in the case that the spin‐orbit coupling of the anisotropic ion is larger than its exchange coupling to the Fe3+ neighbors. This especially implies a modification of the anisotropy contribution of the anisotropic ions. The canting will further cause a decrease in the saturation magnetization which becomes in addition anisotropic.
3 citations