| 1. |
- Benguerine, O., et al.
(författare)
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Structural, elastic, electronic, and magnetic properties of Ni2MnSb, Ni2MnSn, and Ni2MnSb0.5Sn0.5 magnetic shape memory alloys
- 2020
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Ingår i: Revista mexicana de física. - : SOC MEXICANA FISICA. - 0035-001X. ; 66:2, s. 121-126
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Tidskriftsartikel (refereegranskat)abstract
- Structural, elastic, electronic, and magnetic properties of the Nickel-based magnetic shape memory alloys (MSMA) Ni2MnSb, Ni2MnSn and Ni2MnSb0.5Sn0.5, are investigated using the full-potential linearized plane wave plus local orbital method (FP-LAPW+10). With Perdew-Burke-Ernzerhof (PBE) exchange-correlation, generalized gradient approximation (GGA) is used to describe the electronic exchange correlation energy. Equilibrium lattice constant, bulk modulus, and its pressure derivative are calculated and compared with available data. Using the total energy versus strain in the framework of the FP-LAPW+lo approach, we compute the elastic constants of the studied compounds in their austenite structure. Good agreement is found with other calculations both for Ni2MnSb and Ni2MnSn. Magnetic moments agree well with available results.
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| 2. |
- Cardenas, J. F., et al.
(författare)
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Raman spectroscopy of carbon nano-particles synthesized by laser ablation of graphite in water
- 2017
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Ingår i: Revista mexicana de física. - 0035-001X. ; 63:1, s. 71-75
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Tidskriftsartikel (refereegranskat)abstract
- Carbon nanoparticles (CNPs) have been synthesized by laser ablation of polycrystalline graphite in water using a pulsed Nd:YAG laser (1064 nm) with a width of 8 ns. Structural and mesoscopic characterization of the CNPs in the supernatant by Raman spectroscopy provide evidence for the presence of mainly two ranges of particle sizes: 1-5 nm and 10-50 nm corresponding to amorphous carbon and graphite NPs, respectively. These results are corroborated by complementary characterization using atomic force microscopy (AFM) and transmission electron microscopy (TEM). In addition, large (10-100 mu m) graphite particles removed from the surface are essentially unmodified (in structure and topology) by the laser as confirmed by Raman analysis.
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| 3. |
- Cortes-Perez, O., et al.
(författare)
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Bragg difraction of optical guided waves by spin-dipole waves in double layer ferromagnetic wave guides
- 2008
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Ingår i: Revista mexicana de física. - 0035-001X. ; 54:5, s. 376-381
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Tidskriftsartikel (refereegranskat)abstract
- The peculiarities of the Bragg diffraction of optical guided waves (OGWs) by spin-dipole waves (SDWs) in a new ferrite heterostructure, based on Bi3Fe5O12(BIG) thin film deposited on a standard YIG/GGG (a Yttrium Iron Garnet thin film over a Galium Gadolinum Garnet substrate) sample, is presented. It is shown that the efficiency of waveguide magnetooptic interaction between OGWs and SDWs in BIG/YIG/GGG can be 4-14 times larger than in the standard YIG/GGG waveguide, even in the case when the interacting waves are localized in YIG waveguide layer.
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| 4. |
- Cortés-Pérez, O., et al.
(författare)
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Difracción de Bragg de ondas ópticas guiadas por ondas de dipolo de spin en guías de onda ferromagnéticas de doble capa
- 2008
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Ingår i: Revista Mexicana de Fisica. - 0035-001X. ; 54:5, s. 376-381
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Tidskriftsartikel (refereegranskat)abstract
- The peculiarities of the Bragg diffraction of optical guided waves (OGWs) by spin-dipole waves (SDWs) in a new ferrite heterostructure, based on Bi3Fe5O12(BIG) thin film deposited on a standard YIG/GGG (a Yttrium Iron Garnet thin film over a Galium Gadolinum Garnet substrate) sample, is presented. It is shown that the efficiency of waveguide magnetooptic interaction between OGWs and SDWs in BIG/YIG/GGG can be 4-14 times larger than in the standard YIG/GGG waveguide, even in the case when the interacting waves are localized in YIG waveguide layer.
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| 5. |
- Yanez, R, et al.
(författare)
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Observation of fusion-like residues in energetic nuclear collisions at the Celsius storage ring
- 2002
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Ingår i: Revista Mexicana de Física. - 0035-001X. ; 48:Suppl 3, s. 100-102
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Tidskriftsartikel (refereegranskat)abstract
- Recent experiments at the CELSIUS storage ring of Uppsala, Sweden, have revealed the existence of high momentum transfer target-like fragments contrary to expectations. Recoiling heavy fragments in the reaction of 250 MCV/nucleon N-14 on Xe-131 have been measured at 10degrees with respect to the beam direction with specially designed recoil telescopes, Simulations with the Boltzmann-Uehling-Uhlenbeck (BUU) transport equation are not able to reproduce the experimental observations, Intermediate mass fragments (IMF: 3 less than or equal to Z less than or equal to 8) were also measured using three elements of the CIRCSi DeltaE - E telescopes. Single energy spectra of IMFs suggest that the larger fragments (Z = 7, 8) are preferentially emitted from a single equilibrated, but very hot source (T approximate to 9 MeV).
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