Myriam P. Sarachik

TL;DR: In this paper, the authors fit a random-field Ising ferromagnet in a transverse magnetic field, where the randomness derives from the intrinsic distribution of locally tilted magnetic easy axes known to exist in Ω(n)-acetate crystals, suggesting that the random field may be tuned by a field applied transverse to the easy axis.

TL;DR: In this article, a wire heater was used to ignite magnetic avalanches in fixed magnetic field applied along the easy axis of single crystals of the molecular magnet Mn12 acetate, and fast local measurements of the temperature and time-resolved measurements of local magnetization as a function of magnetic field were reported.

TL;DR: Hall sensor measurements of the magnetic relaxation of Mn$12}$ acetate as a function of magnetic field applied along the easy axis of magnetization have been reported in this article, which provides strong new evidence for an abrupt ''first-order'' transition between thermally-assisted relaxation and magnetic decay via quantum tunneling.

TL;DR: Hall sensor measurements of the magnetic relaxation of Mn12 acetate as a function of magnetic field applied along the easy axis of magnetization were reported in this paper, indicating an abrupt shift between thermally activated and ground-state tunneling over a narrow range of temperature.