مرکز منطقه ای اطلاع رساني علوم و فناوري - Specific Resistance, Scattering Asymmetry, and Some Thermal Instability, of Co/Al, Fe/Al, and Co <sub>91</sub>Fe<sub>9</sub> /Al Interfaces

DocumentCode :

861446

Title :

Specific Resistance, Scattering Asymmetry, and Some Thermal Instability, of Co/Al, Fe/Al, and Co ₉₁Fe₉ /Al Interfaces

Author :

Theodoropoulou, N. ; Sharma, A. ; Haillard, T. ; Loloee, R. ; Pratt, W.P., Jr. ; Bass, J. ; Zhang, J. ; Crimp, M.A.

Author_Institution :

Dept. of Phys. & Astron., Michigan State Univ., East Lansing, MI

Volume :

Issue :

fYear :

2007

fDate :

6/1/2007 12:00:00 AM

Firstpage :

2860

Lastpage :

2862

Abstract :

From measurements of the Current-Perpendicular-to-Plane (CPP) resistances and magnetoresistances (MRs) of sputtered [F/Al]_N (F= Co, Fe, Co₉₁Fe₉) multilayers with N-bilayers, and F/Al-based exchange-biased spin-valves, we estimate interface specific resistances, 2AR_FAl/^*, and scattering asymmetries, gammaF/Al, for each metal pair at 4.2 K. In all three cases, 2AR_FAl/^*is large and gamma_FAl/is small, comparable to the recently determined values of 2AR_PyAl/^* ~9fOmegam²and gamma_PyAl/~0.03 for Permalloy (Py)/Al interfaces. The values of 2ARF/Al* with Al are too large to be explained by the resistivities of alloyed F/Al interfaces. The similarity of results for Py, Fe, Co, and Co₉₁Fe₉suggests that spin dependent scattering at F/Al interfaces is determined mainly by the properties of Al. We find that F/Al interfaces are not stable over time at 295 K or upon annealing to 450 K

Keywords :

aluminium; annealing; cobalt; cobalt alloys; ferromagnetic materials; iron; iron alloys; magnetic multilayers; magnetoresistance; spin valves; 4.2 K; Co-Al; Co₉₁Fe₉-Al; Fe-Al; Permalloy interfaces; current-perpendicular-to-plane resistances; exchange-biased spin-valve; interface specific resistance; magnetoresistances; resistance; scattering asymmetries; scattering asymmetry; spin dependent scattering; sputtered multilayer; thermal instability; Aluminum alloys; Annealing; Conductivity; Current measurement; Electrical resistance measurement; Iron; Magnetic multilayers; Magnetoresistance; Scattering; Thermal resistance; Current perpendicular-to-plane (CPP) magnetoresistance (MR); interface resistance; interface scattering asymmetry;

fLanguage :

English

Journal_Title :

Magnetics, IEEE Transactions on

Publisher :

ieee

ISSN :

0018-9464

Type :

jour

DOI :

10.1109/TMAG.2007.892173

Filename :

4202943

Link To Document :

https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=49&DC=861446