In-plane anisotropy

None of the biaary compounds with this composition is well matched to the needs of MO recording. Gd—Fe has too high a Curie temperature and has an in-plane anisotropy. Tp is too low for binary alloys such as Tb—Fe and Dy—Fe. Co-based alloys which exhibit a close to room temperature have... 

In this measurement, the hysteresis problem was solved by applying a constant transverse field. In eq. (18), this transverse field does not occur due to cancelling of terms. The same holds for the (in-plane) anisotropy and the shape anisotropy. Baril et al. (loc. cit.) claim that this is a reliable method, giving results consistent with the cantilever method and with a sensitivity better than I x 10-7. It is perhaps worthwhile, however, to consider all... 

The normalised magnetostriction as a function of normalised magnetisation for films with perpendicular and parallel anisotropy is plotted in fig. 27(a, b) for (Tbo.27Dyo.73)o.42Feo.58 (Schatz et al. 1994). The films with in-plane anisotropy appear to show high magnetostriction and magnetisation at low fields (the coercivity is less than 0.01 T), due to the easy rotation of the spins in the isotropic plane. The motion of 180°... 

Fig. 18. Temperature dependence of the magnetization of a LuNi2B2C single crystal in a field of 3 T applied along the crystallographic directions c, a and (110), clearly showing an out-of-(tetragonal basal) plane anisotropy as well as an in-plane anisotropy of Hc2 where Hc2(T) is determined by the indicated linear extrapolation (after...

We conclude this subsection with several remarks on the interpretation of the anisotropy of Hc2. The largest in-plane anisotropy reported by Metlushko et al. (1997) coincides with the direction of the nesting vector (0.55,0,0). Another manifestation of strong local anisotropy effects is provided by deviations from the 9 (angular) dependence due to anisotropic effective masses (Fermi velocities)... 

Here, we report on high-field ESR properties of the 5=1 Heisenberg chain system Ni(C2H8N2)2Ni(CN)4 (NENC) [16,31], This material is characterized by strong in-plane anisotropy D/k= 6 K, and so far can be considered as the best known candidate for a quantum 5=1 chain in the large-D limit (D/J=1.5) [32],... 

On a phenomenological level the in-plane anisotropy of Hc2 cannot be explained within the (local) GL theory. In principle, non-local extension introduced by Hohenberg and Werthamer (1967) might be helpful to overcome this difficulty. In this approach, which is valid for weak anisotropies, in addition to the second rank mass tensor, a fourth rank tensor is introduced. The non-local effects were predicted to be observable in sufficiently clean materials where the transport... 

FIGURE 54 Four-fold in-plane anisotropy of (a) the superconducting gap and (c) the Fermi velocity together with the orientations of the square lattice (b) Dg and (d) Dp relative to the... 

Such strong 0 and -dependence can only arise from a coherent open Fermi surface with significant in-plane anisotropy. The Fermi surface of such a quasi-two dimensional metal is most elegantly expressed in the form of an expansion in cylindrical coordinates [5] ... 

Due to the gap opening the FS consists of a closed hole-like orbit and two open corrugated sheets [164], giving rise to an observable in-plane anisotropy of these quasi-2D materials. Experimentally, this anisotropy could easily be detected, e. g., by optical reflectivity measurements [165]. 

This large In-plane anisotropy which was first observed for Co(sa]en) (75) was later confirmed by detailed single crystal measurements 47, 76, 44,12) on related... 

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