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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| Дата: | 2006 |
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| Автори: | , , , , , |
| Формат: | Стаття |
| Мова: | English |
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НТК «Інститут монокристалів» НАН України
2006
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| 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 |
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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 |
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| first_indexed |
2023-10-18T21:07:34Z |
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2023-10-18T21:07:34Z |
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