An arrangement of magnetic moments of Со ions in the ac plane for a single-crystal of CoTAC. The rectangle highlights a unit cell.
The dependence M(H) of a single crystal of CoTAC along the а axis at the temperatures T, K: 4.2 (—), 3.97 (– ·· –), 3.37 (···), 2.88 (---).
The dependence of the time constant τ of CoTAC on temperature at Н, Oe: 105 (○), 140 (▼), 350 (⬒), 420 (●), 525 ().
The dependence of the time constant τ of CoTAC on an external magnetic field at T, K: 1.5 (—), 1.54 (●), 1.67 (), 1.81 ().
A hysteresis loop of the magnetic CoTAC along the axis a at the temperature 0.73 K. The solid line—an experiment, the dotted line—a theory.
The temperature dependence of the hysteresis loop width (coercivity) Hc . CoTAC. The points—an experiment, the solid line—a theory.
The temperature dependences of magnetic moment along the а axis, obtained in the regime of ZFC and FC in the temperature range 2.4–0.5 K and in magnetic fields 60–600 Oe.
The field dependence of the divergence temperature, T*, of ZFC and FC curves. The points—an experiment, the lines—a theory. The dash-dot line—a noninteracting superparamagnet, the solid line—an interacting superparamagnet.
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