Temperature dependence of the magnetic moment projection on the -axis for the sample No. 1 at different applied magnetic fields . Triangular hysteresis is seen below 25 K at and . The “butterfly pattern” between 40 and 60 K marks the first order transition at the compensation point.
Upper panel: family of hysteresis loops for the sample No. 1. Four characteristic loop shapes are shown. Lower panel: general view of magnetic moment behavior in a wide field interval of ±10 kOe.
Family of hysteresis loops for the sample No. 2.
Family of hysteresis loops for the sample No. 3.
Magnetic moment of (sample No. 1) in a weak external field above and below . Triangular hysteresis occurs at the same value of magnetization on both sides of the compensation point. Inset: hysteresis loops in the interval of the triangular temperature hysteresis above exhibit a triangular-tail shape similar to those found in the hysteresis interval below (Fig. 2). In both cases these loop shapes determine the triangular shape of the hysteresis.
Magnetic moment of (sample No. 3) in a weak external field above and below .
Temperature dependence of magnetic moment in (sample No. 4) in a weak external field .
Hysteresis loop of the square array of permalloy circular dots (dot diameter , dot thickness 50 nm, center to center distance—, total patterned area ).
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