Magnetic susceptibility and magnetic resonance in the ordered state of single-crystal [NH3(CH2)2HN3]CuBr4

Abstract

We report here the single-crystal magnetic susceptibility data and the magnetic resonance behavior in the ordered state of (NH3(CH2)2NH3)CuBr4, which is a strongly coupled, pseudo-1D, Heisenberg antiferromagnet with strong in-plane ferromagnetic coupling. The Neel temperature is 58 K and appears to be sample-dependent. The observed resonances occur near g=2 with small anisotropies and suggest hidden spin canting with a second magnetic phase transition into a different ordered state at 20 K.