T.R. McGuire, S.A. Shivashankar, et al.
Journal of Applied Physics
Antiferromagnetic resonance has been observed in single crystals of a new cubic antiferromagnet with the Perovskite structure, TlMnF3. The crystals were grown from a melt in a sealed platinumlined molybdenum container under a slightly positive TlF pressure. AFMR at 25 GHz was used to determine TlMnF3 to be an undistorted cubic antiferromagnet at 4.2°K with 〈111〉 easy axes. At 4.2°K the exchange field was determined as HE = 630 kOe, the cubic anisotropy field as HA = -4K 1/3Ms = 6.8 Oe and the linewidth as 80 Oe. The linewidth is mainly due to inhomogeneous strain broadening. From measurements of AFMR field vs axial stress, the Néel temperature has been determined as T N = 76±1°K and the magnetostriction constant as λ100 = -4b1/[3(c11-c12)] = -3.2×10-6 at 4.2°K. The spin-lattice stress coefficient for Mn2+ is C11 = 4.7×10-13 cm/dyn per ion after correcting for the magnetic dipolar contribution. The paramagnetic Curie temperature has been determined from high temperature susceptibility measurements as θ = -138°K. © 1967 The American Institute of Physics.
T.R. McGuire, S.A. Shivashankar, et al.
Journal of Applied Physics
M.W. Shafer, J.D. Kuptsis
Journal of Physics and Chemistry of Solids
I.F. Chang, M.W. Shafer
Applied Physics Letters
I.F. Chang, G.A. Sai-Halasz, et al.
Journal of Luminescence