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Identification of Ni-vacancy defect in Ni-Mn-Z (Z = Ga, Sn, In): An experimental and DFT positron annihilation study
(APS, 2019-02-21)
[EN] By means of experimental positron-annihilation-lifetime measurements and theoretical density functional theory (DFT) positron-lifetime calculations, vacancy-type defects in Ni50Mn50−xSnx (x=25, 20,15,13,10) and ...
Observation of a charge delocalization from Se vacancies in Bi2Se3: A positron annihilation study of native defects
(APS, 2016-07-27)
[EN] By means of positron annihilation lifetime spectroscopy, we have investigated the native defects present in Bi2Se3, which belongs to the family of topological insulators. We experimentally demonstrate that selenium ...
Experimental observation of vacancy assisted martensitic transformation shift in Ni-Fe-Ga alloys
(APS, 2019-04-23)
[EN] Positron annihilation lifetime spectroscopy is used to experimentally demonstrate the direct relationship between vacancies and the shift of the martensitic transformation temperature in a Ni55Fe17Ga28 alloy. The ...
Vacancies mediated ordering in Ni-Mn-Ga shape memory alloys
(Elsevier, 2022-07-01)
[EN] Vacancy mediated diffusion is the main atomic mechanism that controls the ordering of substitutional alloys. In particular, in Ni-Mn-Ga shape memory alloys vacancies control the evolution of the L21 atomic order degree ...
Low temperature magnetic properties of a Ni50Mn34In16 ball-milled metamagnetic shape memory alloy
(Elsevier, 2016-09-01)
[EN] The effect of the atomic disorder induced by ball-milling on the structure and the magnetic properties has been analyzed in a Ni50Mn34In16 metamagnetic shape memory alloy. The as-milled samples displayed an amorphous ...
Mechanically induced disorder and crystallization process in Ni-Mn-In ball-milled alloys
(Elsevier, 2016-12-25)
[EN] High mechanical deformation has been induced in a Ni-Mn-In metamagnetic shape memory alloy by means of ball milling. The evolution of both the martensitic transformation and the magnetic properties associated to the ...
Antitumor magnetic hyperthermia induced by RGD-functionalized Fe3O4 nanoparticles, in an experimental model of colorectal liver metastases
(Beilstein-Institut, 2016-10-28)
This work reports important advances in the study of magnetic nanoparticles (MNPs) related to their application in different research fields such as magnetic hyperthermia. Nanotherapy based on targeted nanoparticles could ...
Calculation of positron characteristics for elements of the periodic table
(IOP Publishing Ltd, 2011-01-10)
Positron lifetimes have been calculated in bulk and monovacancies for most of the elements of the
periodic table. Self-consistent and non-self-consistent schemes have been used for the calculation of the
electronic ...
Sensitiveness of the ratio between monovacancy and bulk positron lifetimes to the approximations used in the calculations: Periodic behaviour
(Elsevier, 2012-05-09)
Positron lifetimes have been calculated in bulk and monovacancies for most of the elements of the periodic table. Self-consistent and non-self-consistent schemes have been used for the calculation of the electronic structure ...
Positron lifetime calculation of the elements of the periodic table
(IOP, 2007-04-10)
Theoretical positron lifetime values have been calculated systematically for most of the elements of the periodic table. Self-consistent and non-self-consistent schemes have been used for the calculation of the electronic ...