Transport properties of Fe60Al40 during the B2 to A2 structural phase transition

Abstract

The variation of transport behaviour in a mesoscopic Fe60Al40 wire, initially possessing the ordered B2-phase structure, has been observed while inducing a phase transition to the disordered A2 structure. Gradual disordering was achieved using a highly focused beam of Ne+-ions. Both electrical resistance and anomalous Hall effect were measured in parallel with the local ion irradiation. Both the normal and Hall resistivity show a peak as a function of fluence. Moreover, the relationship between Hall resistivity and normal resistivity reconfirms the presence of two distinct regimes in the transition. Furthermore, field-dependence and temperature-dependence measurements were used to identify that it is necessary to consider the effect of scattering from magnetic clusters to understand these different regimes in transport properties.

Displacement Damage, Total Ionizing Dose, and Transient Ionization Effects in Gate-All-Around Field Effect Transistors

“…Here, we report a model predicting the probability and the amount of displacement damage (DD) from particle irradiation in devices smaller than a single damage cascade. − We model neutrons since they are the most relevant particle for DD in radiation applications. However, to enable targeted irradiation and avoid activation of parts, we use ions in experiments. − The damage equivalence between neutrons and ions has previously been demonstrated. ,, We show the use of three external surrogate stimuli to simulate the effect of radiation on strained channel GAA NSFETs. We use a Li focused ion beam (FIB) to simulate DD, an electron beam in a scanning electron microscope (SEM) to simulate TID, and high intensity visible light to simulate the transient ionization of SEE.…”

Influence of long- and short-range chemical order on spontaneous magnetization in single-crystalline Fe0.6Al0.4 compound thin films

“…In case of Fe-Al system, the ferromagnetism vanishes by the chemical ordering [7][8][9][10][11][12][13][14][15][16][17][18][19]. In the Fe-Al disordered alloy with the Al composition below ∼28 at%, M S decreases with increasing the Al composition.…”

“…magnetostrictive materials [26][27][28] and structural materials with the low density and the high corrosion resistance [14][15][16]29]. Besides, the Fe-Al compounds retrieved the attention in the field of spintronics since the partially ordered or fully disordered Fe 1−x Al x showed the relatively high anomalous Hall angles (∼3%) without using the heavy-metal elements [19,24,25,30].…”

“…The B2 phase with the low S or the fully-disordered BCC phase for x > 0.35 have not been achieved by the conventional process such as the rapid quenching [13]. Alternatively, the high-energy process such as ball milling [8,11,13,16,31], ion irradiation [17,19,25,30], cold working [32], and highpressure compression [15] is required. Basically, to address the inherent relationship between M S and S, other structural parameters such as crystallite size should be maintained.…”