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Magnetic field induced martensitic transformation in Fe-Mn-Ga Heusler alloys has been discovered by W. Zhu et. al and T. Omori et. al respectively in 2009 [1, 2]. Thereafter, very few works concerned about this alloy, considering its great potential of giant shape memory strain, large exchange bias and magnetocaloric effect [3]. One obstacle is that the crystal structure transitions of this material...
Chemical ordering has crucial influences on the magnetic and other properties of Heusler alloys [1, 2]. Recently, theoretical investigations predict that highly ordered Fe2CrAl with L21 structure exhibits a half-metallic property with spin polarization of 82%[1]. However, other calculations based on experimental lattice parameters show a non-half-metallic property[2]. Additionally, the theoretical...
We report a novel microfluidic surface-enhanced Raman scattering (SERS) device, which is achieved by bonding a polydimethylsiloxane cap with a microchannel structure onto an SERS-active substrate composed of noble-metal covered silicon nanopillar forests. The silicon nanopillar forests are fabricated by using nanomaterial dots, which are introduced in oxygen-plasma bombardment of photoresist, as etching...
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