scholarly journals Element-Specific Magnetization Dynamics in Co–Pt Alloys Induced by Strong Optical Excitation

2021 ◽  
Author(s):  
Igor Vaskivskyi ◽  
Rameez Saeed Malik ◽  
Leandro Salemi ◽  
Diego Turenne ◽  
Ronny Knut ◽  
...  
Keyword(s):  
Optical Excitation ◽  
Specific Magnetization ◽  
Magnetization Dynamics ◽  
Pt Alloys

Ultrafast element-specific magnetization dynamics of complex magnetic materials on a table-top

2013 ◽  
Vol 189 ◽  
pp. 164-170 ◽  
Author(s):  
Stefan Mathias ◽  
Chan La-o-vorakiat ◽  
Justin M. Shaw ◽  
Emrah Turgut ◽  
Patrik Grychtol ◽  
...  
Keyword(s):  
Magnetic Materials ◽  
Specific Magnetization ◽  
Magnetization Dynamics

Optical excitation of magnetization dynamics in magnetic optical microcavity

2017 ◽  
Author(s):  
A. Kalish ◽  
M. Kozhaev ◽  
A. Chernov ◽  
A. Shaposhnikov ◽  
V. Berzhansky ◽  
...  
Keyword(s):  
Optical Excitation ◽  
Magnetization Dynamics ◽  
Optical Microcavity

A setup for element specific magnetization dynamics using the transverse magneto-optic Kerr effect in the energy range of 30-72 eV

2017 ◽  
Vol 88 (3) ◽  
pp. 033113 ◽  
Author(s):  
S. Jana ◽  
J. A. Terschlüsen ◽  
R. Stefanuik ◽  
S. Plogmaker ◽  
S. Troisi ◽  
...  
Keyword(s):  
Energy Range ◽  
Kerr Effect ◽  
Specific Magnetization ◽  
Magnetization Dynamics ◽  
Magneto Optic

scholarly journals Element-Specific Magnetization Dynamics of Complex Magnetic Systems Probed by Ultrafast Magneto-Optical Spectroscopy

2020 ◽  
Vol 10 (21) ◽  
pp. 7580
Author(s):  
Clemens von Korff Schmising ◽  
Felix Willems ◽  
Sangeeta Sharma ◽  
Kelvin Yao ◽  
Martin Borchert ◽  
...  
Keyword(s):  
Optical Spectroscopy ◽  
Extreme Ultraviolet ◽  
High Harmonic ◽  
Specific Magnetization ◽  
Magnetization Dynamics ◽  
Magnetic Systems ◽  
Linearly Polarized ◽  
Laser Facility ◽  
The One ◽  
Polarized Radiation

The vision to manipulate and control magnetism with light is driven on the one hand by fundamental questions of direct and indirect photon-spin interactions, and on the other hand by the necessity to cope with ever growing data volumes, requiring radically new approaches on how to write, read and process information. Here, we present two complementary experimental geometries to access the element-specific magnetization dynamics of complex magnetic systems via ultrafast magneto-optical spectroscopy in the extreme ultraviolet spectral range. First, we employ linearly polarized radiation of a free electron laser facility to demonstrate decoupled dynamics of the two sublattices of an FeGd alloy, a prerequisite for all-optical magnetization switching. Second, we use circularly polarized radiation generated in a laboratory-based high harmonic generation setup to show optical inter-site spin transfer in a CoPt alloy, a mechanism which only very recently has been predicted to mediate ultrafast metamagnetic phase transitions.

scholarly journals Multiscale modeling of ultrafast element-specific magnetization dynamics of ferromagnetic alloys

2015 ◽  
Vol 92 (5) ◽  
Author(s):  
D. Hinzke ◽  
U. Atxitia ◽  
K. Carva ◽  
P. Nieves ◽  
O. Chubykalo-Fesenko ◽  
...  
Keyword(s):  
Multiscale Modeling ◽  
Specific Magnetization ◽  
Magnetization Dynamics ◽  
Ferromagnetic Alloys

A Metastable Crystalline Phase Coexisted with the Decagonal Quasicrystals in Rapidly Solidified Al-Ir Al-Pd and Al-Pt Alloys

1990 ◽  
Vol 48 (1) ◽  
pp. 572-573
Author(s):  
Wang Rong ◽  
Ma Lina ◽  
K.H. Kuo
Keyword(s):  
Metastable Phase ◽  
Hexagonal Phase ◽  
Icosahedral Quasicrystal ◽  
Decagonal Quasicrystal ◽  
Decagonal Phase ◽  
Decagonal Quasicrystals ◽  
Pt Alloy ◽  
Pt Alloys ◽  
Diffraction Patterns ◽  
Rapidly Solidified

Up to now, decagonal quasicrystals have been found in the alloys of whole Al-Pt group metals [1,2]. The present paper is concerned with the TEM study of a hitherto unreported hexagonal phase in rapidly solidified Al-Ir, Al-Pd and Al-Pt alloys.The ribbons of Al5Ir, Al5Pd and Al5Pt were obtained by spun-quenching. Specimens cut from the ribbons were ion thinned and examined in a JEM 100CX electron microscope. In both rapidly solidified Al5Ir and Al5Pd alloys, the decagonal quasicrystal, with rosette or dendritic morphologies can be easily identified by its electron diffraction patterns(EDPs). The EDPs of the decagonal phase for the two alloys are quite similar. However, the existance of decagonal quasicrystal in the Al-Pt alloy has not been verified by our TEM study. It is probably for the reason that the cooling rate is not great enough for the Al5Pt alloy to form the decagonal phase. During the TEM study, a metastable hexagonal phase has been observed in the Al5Ir, Al5Pd and Al5Pt alloys. The lattic parameters calculated from the X-ray powder data of this phase are a=1.229 and c=2.647nm(Al-Pd) and a=1.231 and c=2.623nm(Al-Ir). The composition of this phase was determined by EDS analysis as Al4(Ir, Pd or Pt). It coexists with the decagonal phase in the alloys and transformed to other stable crystalline phases on heating to high temperature. A comparison between the EDPs of the hexagonal and the decagonal phase are shown in Fig.l. Fig. 1(a) is the EDPs of the decagonal phase in various orientions and the EDPs of the hexagonal phase are shown in Fig.1(b), in a similar arrangement as Fig.1(a). It can be clearly seen that the EDPs of the hexagonal phase, especially the distribution of strong spots, are quite similar to their partners of the decagonal quasicrystal in Fig.1(a). All the angles, shown in Fig.l, between two corresponding EDPs are very close to each other. All of these seem strongly to point out that a close structural relationshipexists between these two phases:[110]//d10 [001]//d2(D) //d2 (P)The structure of α-AlFeSi is well known [3] and the 54-atom Mackay icosahedron with double icosahedral shells in the α-AlFeSi structure [4] have been used to model the icosahedral quasicrystal structure. Fig.2(a) and (b) show, respectively, the [110] and [001] projections of the crystal structure of α- AlFeSi, and decagon-pentagons can easily be identified in the former and hexagons in the latter. In addition, the optical transforms of these projections show clearly decagons and hexagons of strong spots, quite similar to those in [110] and [001] EDPs in Fig.1(b). This not only proves the Al(Ir, Pt, Pd) metastable phase being icostructural with the α-AlFeSi phase but also explains the orientation relationship mentioned above.

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