Soft magnetic properties of rapidly quenched FeAlM (M  Si, B, Ge) alloys

Abstract

Magnetic properties such as magnetization, coercivity, and magnetostriction of rapidly quenched ternary Fe~oo--2--yAlzSiy (0 5 x 5 28.3, 0 5 y 5 lo), Feloo--o--yAlzBy, and Feeloo-zA1,Gey (0 2 x 5 28.3, 0 5 y 5 20.4) are investigated. I n the Fe-Al-Si system, the alloys near Fe,Al,, composition exhibit relatively soft magnetic properties. In the Fe-Al-B system, amorphous structure is achieved in the range 12 5 y 5 25 and best soft magnetic properties, H, = 1.6 A/m, Bs = 1.1 T, pm = 1.4 x lo5, e = 160 pi2 cm are obtained around Fe,,,Al,B,, composition. I n the Fe-Al-Ge system, magnetostriction is nearly zero in the composition range 0 5 x 5 15, 10 5 5 y 5 15. The Fe-rich alloys in Fe-Al-Si and Fe-Al-Ge systems show a high saturation induction above 2.0 T and a small magnetostriction less than 10 x Magnetisohe Eigenschaften, wie Magnetisierung, Koerzitivkraft und Magnetostriktion, von schnell abgeschrecktem, terniirem Feloo-2-vA1,Si-y (0 5 x 5 28,3, 0 5 y 5 lo), FelOo--z--yA1zBy und Feloo-zA1,Gey (0 5 5 5 28,3, 0 5 y 5 20,4) werden untersucht. Im Fe-Al-Si-System zeigt die Legierung in der Niihe der Fe,,Al,,-Zusammensetzung relativ weiche megnetische Eigenschaften. Im Fe-Al-B-System wird die amorphe Struktur im Bereich 12 5 y 5 26 erreicht, und die weichmagnetischen Eigenschaften, H, = 1,6 A/m, B, = 1,l T, pm =

The antikaon–nucleus interaction and alternative views to deeply bound antikaonic nuclear systems

“…(11) of this reference), shows that Fermi motion effects produce a broadening of the proton peak of ∼ 70 MeV/c for K − absorption in 4 He and of ∼ 20 MeV/c if the absorption takes place in 6 Li. As noted above, the KEK group reported recently [23,24] some deficiencies in correcting the proton efficiencies of their previous experiment, and the new proton spectrum obtained in the KEK PS-E549 experiment no longer shows a peak but a bump. What is clear is that recoil-broadening effects of 70 MeV/c plus formation rates of ∼ 1% make the observation of this peak hard, unless specific kinematical and particle selection cuts are applied.…”

“…Together with the interpretation of the peak seen in the proton momentum spectrum [22][23][24]27] as coming from a two-nucleon kaon absorption mechanism, where the rest of the nucleus acts as a spectator and the daughter nucleus remains in its ground state [25,27], it seems then clear that there is at present no experimental evidence for the existence of deeply bound kaonic states.…”

“…If interpreted as a (K − pnn) bound state, it would have a binding energy of 194 MeV. We note that deficiencies in the efficiency corrections were revealed in the last HYP06 conference, and the improved KEK PS-E549 proton momentum spectrum does not show this peak anymore but a bump [23,24]. Strong criticisms to the theoretical claims of Refs.…”

Experimental Progress in Hypernuclear Physics

“…58) Unexpectedly, a strong peak with a width of ∼ 20 MeV was observed in the (K − stop , p) spectrum in a deeply bound region. 59) However, this peak was not confirmed in the later measurement of KEK-PS E549, 60) and it was found to be an experimental artifact. 61) In-flight (K − , n/p) reactions at the K − incident momentum of 1 GeV/c were used to produce kaonic nuclei in KEK-PS E548 by Kishimoto's group.…”

Search for kaonic nuclear state, K − pp, in the p + p → X + K + reaction with FOPI

“…Following the prediction, a number of experiments have put an effort into searching for such states, either analyzing already existing data or performing a dedicated experiment [3][4][5][6][7][8][9]. Some results indicate a possible interpretation of the spectrum as the kaonic nuclear state, however, no clear evidence has been obtained mostly due to lack of statistics.…”