Electronic structure of Ni-Mn-Ga magnetic shape memory alloy studied be EELS method

The evolution of 3d electronic structure associated with the martensitic transformation and ferromagnetic transition in non-stoichiometric Ni₂MnGa alloy possessing the shape magnetic memory were studied by electron-energy loss spectroscopy (EELS) and with theoretical modeling methods. The EELS spect...

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Бібліографічні деталі
Дата:2006
Автори: Ochoa-Gamboa, R., Flores-Zuniga, H., Espinosa-Magana, F., Rios-Jara, D., Glavatskyy, I., Glavatska, N.
Формат: Стаття
Мова:English
Опубліковано: НТК «Інститут монокристалів» НАН України 2006
Назва видання:Functional Materials
Онлайн доступ:http://dspace.nbuv.gov.ua/handle/123456789/134178
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Назва журналу:Digital Library of Periodicals of National Academy of Sciences of Ukraine
Цитувати:Electronic structure of Ni-Mn-Ga magnetic shape memory alloy studied be EELS method / R.Ochoa-Gamboa, H.Flores-Zuniga, F.Espinosa-Magana, D.Rios-Jara, I.Glavatskyy, N.Glavatska // Functional Materials. — 2006. — Т. 13, № 3. — С. 468-473. — Бібліогр.: 22 назв. — англ.

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Digital Library of Periodicals of National Academy of Sciences of Ukraine
id irk-123456789-134178
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spelling irk-123456789-1341782018-06-13T03:04:56Z Electronic structure of Ni-Mn-Ga magnetic shape memory alloy studied be EELS method Ochoa-Gamboa, R. Flores-Zuniga, H. Espinosa-Magana, F. Rios-Jara, D. Glavatskyy, I. Glavatska, N. The evolution of 3d electronic structure associated with the martensitic transformation and ferromagnetic transition in non-stoichiometric Ni₂MnGa alloy possessing the shape magnetic memory were studied by electron-energy loss spectroscopy (EELS) and with theoretical modeling methods. The EELS spectra of Ni-Mn-Ga crystals have been obtained under in-situ heating to study the electron structure of ferromagnetic (FM) martensite, FM austenite and paramagnetic austenite. When considering the EELS spectra, the total white lines intensity L₂₃ = L₂ + L₃ as well as as well as the L₃/L₂ ratio and conclusions have been drawn on the occupancy of the 3d state fromAs L₂₃ reflects the unoccupied density of states in 3d bands, these results indicate that no charge transfer has taken place during martensitic transformation and changes in the magnetic dipole moments at phase transitions. The experimental results have shown that the magnetic dipole moment on Ni atoms decreases at the reverse martensitic transformationwhile it increases on Mn, and the charge is observed to be redistributed between Mn and Ni in agreement with ab-initio numerical calculations. 2006 Article Electronic structure of Ni-Mn-Ga magnetic shape memory alloy studied be EELS method / R.Ochoa-Gamboa, H.Flores-Zuniga, F.Espinosa-Magana, D.Rios-Jara, I.Glavatskyy, N.Glavatska // Functional Materials. — 2006. — Т. 13, № 3. — С. 468-473. — Бібліогр.: 22 назв. — англ. 1027-5495 http://dspace.nbuv.gov.ua/handle/123456789/134178 en Functional Materials НТК «Інститут монокристалів» НАН України
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
language English
description The evolution of 3d electronic structure associated with the martensitic transformation and ferromagnetic transition in non-stoichiometric Ni₂MnGa alloy possessing the shape magnetic memory were studied by electron-energy loss spectroscopy (EELS) and with theoretical modeling methods. The EELS spectra of Ni-Mn-Ga crystals have been obtained under in-situ heating to study the electron structure of ferromagnetic (FM) martensite, FM austenite and paramagnetic austenite. When considering the EELS spectra, the total white lines intensity L₂₃ = L₂ + L₃ as well as as well as the L₃/L₂ ratio and conclusions have been drawn on the occupancy of the 3d state fromAs L₂₃ reflects the unoccupied density of states in 3d bands, these results indicate that no charge transfer has taken place during martensitic transformation and changes in the magnetic dipole moments at phase transitions. The experimental results have shown that the magnetic dipole moment on Ni atoms decreases at the reverse martensitic transformationwhile it increases on Mn, and the charge is observed to be redistributed between Mn and Ni in agreement with ab-initio numerical calculations.
format Article
author Ochoa-Gamboa, R.
Flores-Zuniga, H.
Espinosa-Magana, F.
Rios-Jara, D.
Glavatskyy, I.
Glavatska, N.
spellingShingle Ochoa-Gamboa, R.
Flores-Zuniga, H.
Espinosa-Magana, F.
Rios-Jara, D.
Glavatskyy, I.
Glavatska, N.
Electronic structure of Ni-Mn-Ga magnetic shape memory alloy studied be EELS method
Functional Materials
author_facet Ochoa-Gamboa, R.
Flores-Zuniga, H.
Espinosa-Magana, F.
Rios-Jara, D.
Glavatskyy, I.
Glavatska, N.
author_sort Ochoa-Gamboa, R.
title Electronic structure of Ni-Mn-Ga magnetic shape memory alloy studied be EELS method
title_short Electronic structure of Ni-Mn-Ga magnetic shape memory alloy studied be EELS method
title_full Electronic structure of Ni-Mn-Ga magnetic shape memory alloy studied be EELS method
title_fullStr Electronic structure of Ni-Mn-Ga magnetic shape memory alloy studied be EELS method
title_full_unstemmed Electronic structure of Ni-Mn-Ga magnetic shape memory alloy studied be EELS method
title_sort electronic structure of ni-mn-ga magnetic shape memory alloy studied be eels method
publisher НТК «Інститут монокристалів» НАН України
publishDate 2006
url http://dspace.nbuv.gov.ua/handle/123456789/134178
citation_txt Electronic structure of Ni-Mn-Ga magnetic shape memory alloy studied be EELS method / R.Ochoa-Gamboa, H.Flores-Zuniga, F.Espinosa-Magana, D.Rios-Jara, I.Glavatskyy, N.Glavatska // Functional Materials. — 2006. — Т. 13, № 3. — С. 468-473. — Бібліогр.: 22 назв. — англ.
series Functional Materials
work_keys_str_mv AT ochoagamboar electronicstructureofnimngamagneticshapememoryalloystudiedbeeelsmethod
AT floreszunigah electronicstructureofnimngamagneticshapememoryalloystudiedbeeelsmethod
AT espinosamaganaf electronicstructureofnimngamagneticshapememoryalloystudiedbeeelsmethod
AT riosjarad electronicstructureofnimngamagneticshapememoryalloystudiedbeeelsmethod
AT glavatskyyi electronicstructureofnimngamagneticshapememoryalloystudiedbeeelsmethod
AT glavatskan electronicstructureofnimngamagneticshapememoryalloystudiedbeeelsmethod
first_indexed 2025-07-09T20:27:45Z
last_indexed 2025-07-09T20:27:45Z
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