Changes in magnetic dynamical characteristics accompanying slowing of spin relaxation below 100 K and freezing of spins detected by muon and neutron diffractions have been found. Magnetic phases identified in CrSBr single crystals by slow magnetization relaxation are caused by stepwise changes in magnetic field, alternating current (ac) magnetic susceptibility, and recording of the first-order reversal curve (FORC). “Slow” magnetic relaxation $\sim {10}^3$ s and FORC highlight spin transition effect on magnetic viscosity and domain dynamics. Below 40 K magnetization reversal is due to nucleation, while above 100 K domain propagation is origin of magnetization reversal. ac susceptibility in the 1- to 100-ms time window indicates gradual temperature-dependent changes in the frequency-independent susceptibility peak, identifying both the Néel temperature ($T_{\mathrm{N}}=132\mathrm{K}$) and thermal fluctuation slowing in the 40 K to 100 K range. Field-dependent magnetic susceptibility indicates spin-flop transitions from the antiferromagnetic to the canted state and to ferromagnetic spin configuration. Changes in magnetization reversal mechanism accompanying spin freezing highlight contribution of spin dynamics and spin relaxation to domain wall dynamics.

Close

PrevNext

View figure in article

• Magnetic phase transitions
• Antiferromagnets
• Crystal structures
• van der Waals systems
• Susceptibility measurements