Memory in nanomagnetic systems: Superparamagnetism versus spin-glass behavior

Spin glass behavior in Sr2Mn0.7Fe0.3MoO6

Spin glass behavior in FeAl2

Magnetic and transport measurements indicate FeAl2 to be an ordered intermetallic spin glass, with canonical behavior including a susceptibility cusp at T f535 K and frequency-dependent susceptibility below T f . The field-cooled and zero-field-cooled magnetization diverge below T f , with hysteresis characteristic of a spin glass. A resistivity minimum just above T f is explained in terms of c...

Memory and superposition in a spin glass

– Non-equilibrium dynamics in a Ag(Mn) spin glass are investigated by measurements of the temperature dependence of the remanent magnetisation. Using specific cooling protocols before recording the thermo-or isothermal remanent magnetisations on reheating , it is found that the measured curves effectively disclose non-equilibrium spin glass characteristics such as ageing and memory phenomena as...

Field-pulse memory in a spin-glass

Spin-glass behavior of semiconducting KxFe2− yS2

We report the discovery of KxFe2−yS2 single crystals, isostructural to KxFe2−ySe2 superconductors. The sulfide compound is a small gap semiconductor and shows spin-glass behavior below 32 K. Our results indicate that stoichiometry, defects, and the local environment of FeCh (Ch = S,Se) tetrahedra have important effects on the physical properties of isostructural and isoelectronic KxFe2−yCh2 com...