ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The Faraday rotation (FR) of scandium substituted holmium iron garnets single crystals Ho3Fe5-zSczO12 (z=0.35, 0.52, 0.56, and 0.73) has been investigated at 1152 nm wavelength in the 6 K〈T〈TNéel temperature range and magnetic field up to 20 kOe applied along the [111] easy axis. At this wavelength, in a narrow concentration range (0.5〈z〈0.6), in addition to the classic magnetic compensation temperature Tcomp, the spontaneous FR Φs(T, z=Cte) curves present two magneto-optic (MO) compensation points TMOComp(1) and TMOComp(2) where the FR vanishes although the ferrite magnetization is different from 0. When z(approximately-greater-than)0.6, only TMOComp(1) remains. These results, due to the influence of the diamagnetic dilution of the octahedral [a] Fe3+ sublattice, are interpreted using the one ion FR model of Crossley et al. and the Dionne-refined Néel model of garnets. They give an indirect experimental confirmation of the temperature dependence of the MO electric dipole coefficient Ce(λ=1152 nm, T), and of the preponderance of the (d)−{c} magnetic interactions compared to the [a]−{c} ones. © 1996 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.362128
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