Double umbrella structure in terbium iron garnet

Far-infrared spectra of the magnetic exchange resonances and optical phonons and their connection to magnetic and dielectric properties of Dy3Fe5OKang1, Standard2, Rogers3 et al. 2012Phys. Rev. B17150View full textAdd to dashboardCite

“…Below 100 K, a rhombohedral distortion of the cubic cell causes the canting of Dy spins, which is described as a "double umbrella structure". 24 The symmetry of Dy 3+ is lowered from 222(D 2 ) tetragonal to 2(C 2 ) monoclinic. Below 50 K, the iron sublattice magnetization does not change appreciably with temperature.…”

Adjusted oscillator strength matching for hybrid magnetic and electric excitations in Dy3Fe5ORogers1, Choi2, Standard3 et al. 2011Phys. Rev. B191121View full textAdd to dashboardCite

“…[10][11][12][13] Although there are no literature reports that Dy-IG is multiferroic, recently two related compounds, antiferromagnetic orthoferrite DyFeO 3 and Tb-IG, were shown to be multiferroic and magneto-dielectric 14,15 . We found a magnetodielectric effect in a weak external magnetic field H of about 2 kOe.…”

Temperature Evolution of the Double Umbrella Magnetic Structure in Terbium Iron Garnet

“…In heavy rare earth iron garnets, there exists a compensation temperature (T comp ) or inversion temperature (T I ) (Herpin, 1968) at which the bulk ferrite magnetization vanishes. For TbIG, T comp is equal to (243.5 ± 0.5 K) and (249.0 ± 0.5 K) for the single crystal and powder samples respectively (Lahoubi et al, 1985;Lahoubi, 1986). In the vicinity of T comp, the magnetic behavior is equivalent to that observed in the antiferromagnet compounds with the existence of the so-called field induced phase transitions which have been studied previously theoretically and experimentally (Zvezdin, 1995).…”

“…In the present chapter, we will present the temperature evolution of the Tb 3+ magnetic ordering in TbIG using powder neutron diffraction experiments combined with magnetic field magnetization measurements on single crystal (Lahoubi et al, , 1985Lahoubi, 1986;Lahoubi et al, 1997;Lahoubi, 2012). The experimental techniques are described in the section 2.…”