Reexamination of Magnetic Susceptibility and Spin Flop at Low-Field in KCuF₃

High-pressure stability relations, crystal structures, and physical properties of perovskite and post-perovskite of NaNiF3

“…The closed circles show the magnetization at H decreasing from 50 to À50 kOe and the open circles at H increasing from À 50 to 50 kOe for NaNiF 3 pPv at 2 K. The double loops observed in Fig. 4(g) may be caused by spin flop transition, as interpreted for the double loops in KCuF 3 [37]. Change from antiferromagnetism under low magnetic field to canted antiferromagnetism under high magntic field for NaNiF 3 pPv supports the spin flop transition.…”

Longitudinal magnetic dynamics and dimensional crossover in the quasi-one-dimensional spin-12Heisenberg antiferromagnetKCuF3Lake1, Tennant2, Nagler3 2005Phys. Rev. B5611600View full textAdd to dashboardCite

“…Typically all eight possible antiferromagnetic domains will form within the sample as it is cooled below T N (see fig 2a) so while longitudinal and transverse magnetic excitations can be defined within each domain they cannot be disentangled for the sample as a whole. However, when a magnetic field B, is applied along the crystallographic b direction of KCuF 3 a reorientation of spin moments occurs resulting in a spin-flop phase for fields above 0.8T [25,31]. In this phase the spin moments flop perpendicular to the b direction and due to the x-y anisotropy [22] they point along the a axis [31] resulting in a unique domain throughout the sample (see fig 2b).…”

“…In zero-field, magnetic order in KCuF 3 is characterised by a structure where spin moments are slightly canted away from the [1,1,0] direction and its symmetry equivalents [23,24,25]. Typically all eight possible antiferromagnetic domains will form within the sample as it is cooled below T N (see fig 2a) so while longitudinal and transverse magnetic excitations can be defined within each domain they cannot be disentangled for the sample as a whole.…”

Lattice vibrations in KCuF3

“…1(a) we show the temperature dependence of the magnetic susceptibility together with a fit obtained by using a rational function which approximates the Bonner-Fisher approach for an antiferromagnetic chain [33,34] traces [35]. The specific heat divided by temperature C/T ( Fig.…”