The manipulation of ferromagnetic layer magnetization via electrical pulse is driving an intense research due to the important applications that this result will have on memory devices and sensors. In this study we realized a magnetotunnel junction in which one layer is made of Galfenol (Fe1-xGax) which possesses one of the highest magnetostrictive coefficient known. The multilayer stack has been grown by molecular beam epitaxy and e-beam evaporation. Optical lithography and physical etching have been combined to obtain 20x20 micron sized pillars. The obtained structures show tunneling conductivity across the junction and a tunnel magnetoresistance(TMR) effect of up to 11.5% in amplitude.

Magnetoresistance of galfenol-based magnetic tunnel junction / B. Gobaut, G. Vinai, C. Castán Guerrero, D. Krizmancic, H. Rafaqat, S. Roddaro, G. Rossi, G. Panaccione, M. Eddrief, M. Marangolo, P. Torelli. - In: AIP ADVANCES. - ISSN 2158-3226. - 5:12(2015 Dec 21), pp. 127128.1-127128.7. [10.1063/1.4939019]

Magnetoresistance of galfenol-based magnetic tunnel junction

G. Rossi;
2015

Abstract

The manipulation of ferromagnetic layer magnetization via electrical pulse is driving an intense research due to the important applications that this result will have on memory devices and sensors. In this study we realized a magnetotunnel junction in which one layer is made of Galfenol (Fe1-xGax) which possesses one of the highest magnetostrictive coefficient known. The multilayer stack has been grown by molecular beam epitaxy and e-beam evaporation. Optical lithography and physical etching have been combined to obtain 20x20 micron sized pillars. The obtained structures show tunneling conductivity across the junction and a tunnel magnetoresistance(TMR) effect of up to 11.5% in amplitude.
magnetic tunnel junctions
Settore FIS/03 - Fisica della Materia
21-dic-2015
Article (author)
File in questo prodotto:
File Dimensione Formato  
1.4939019.pdf

accesso aperto

Tipologia: Publisher's version/PDF
Dimensione 1.67 MB
Formato Adobe PDF
1.67 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/364281
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 1
social impact