Change of the Magnetic Property in Some Amorphous Alloys by Low Temperature Annealing

Influence of the dipolar interactions in the magnetization reversal asymmetry of hard–soft magnetic ribbons

“…Moreover, the phenomenon of the loop displacement has been observed in systems that have not been submitted to the mentioned thermomagnetic treatment but to a conventional annealing without field cooling. 3,4 The most outstanding difference of this loop shift in contrast with the bias one is that it can be tailored by simply premagnetizing the sample in the adequate magnetic field and without any further annealing treatment. In fact, the shift can be canceled by the convenient demagnetizing process of the sample in a decreasing ac field.…”

Asymmetric magnetization reversal of partially devitrified Co66Si15B14Fe4Ni1

“…Nice electron diffraction patterns ( Fig. 1(b)) have been obtained from these bigger particles that have allowed their indexation as Co 3 think that other crystallographic phases are present, probably with smaller particle size. This is confirmed by XRD spectra as shown in Fig.…”

“…There exist at least two kinds of systems in which hysteresis loops are horizontally shifted: the ferromagnetic-antiferromagnetic systems, in which the shift is originated by exchange bias anisotropy [3,4], and the hard-soft systems in which it is caused by the dipolar interactions between the different phases [5]. The study exposed in this paper is devoted to the second kind of phenomenon.…”

Generalizations of theorems on mixing flows with non-degenerate saddle points on a 2-torus

“…For longitudinally field annealed samples one can have H sh > H c , i.e. the central portion of the loop is completely shifted to one side of the H = 0 axis [10][11][12].…”

“…The hard regions were introduced by annealing at temperature T a = 60-470 • C [10,11]. Chen and Pan [12] experimentally studied several samples, and concluded that if T a > 420 • C then the shift should be related to the precipitation of crystallites, with a high H c , from the amorphous matrix [12].…”