Ordering in Heisenberg Spin Glasses

Dorothee Petit (1) , L. Fruchter (1) , I. A. Campbell (2)

1 LPS - Laboratoire de Physique des Solides
2 LCVN - Laboratoire des colloïdes, verres et nanomatériaux

For five different Heisenberg spin glass systems, torque experiments were performed in applied magnetic fields up to $4 T$. The Dzyaloshinski-Moriya random anisotropy strengths, the in-field torque onset temperatures, and the torque relaxation were measured. Critical exponents were estimated independently using a standard protocol. The data are strong evidence for a true spin glass ordered state which survives under high applied magnetic fields; they can be interpreted consistently in terms of a chiral ordering model with replica symmetry breaking as proposed by Kawamura and coworkers.

Domaines: Autre [cond-mat.other]

Dorothee Petit, L. Fruchter, I. A. Campbell. Ordering in Heisenberg Spin Glasses. Physical Review Letters, 2002, 88, pp.207206. ⟨hal-00131586⟩