Giant Inverse Tunneling Magnetoresistance in Single CrO_2 / Vacuum / Ni_80Fe_20 Using Conductive AFM

Author

Suzuki, K. ; Hoshino, J. ; Itoh, M. ; Hiratsuka, T. ; Sawada, A.

Author_Institution

Miyagi Nat. Coll. of Technol., Natori

fYear

2006

fDate

8-12 May 2006

Firstpage

75

Lastpage

75

Abstract

The chromium dioxide (CrO₂) is a half metallic ferromagnet which has both the metallic and semiconductive spin bands.The tunneling magnetoresistance (TMR) has been measured in single CrO₂ deposited on (110) TiO₂/vacuum/ Ni₈₀Fe₂₀ film on the AFM cantilever at room temperature. The behavior showed the giant inverse type of the TMR and the values of the TMR ratio from -74% to -63% were estimated using the experimental results, which means the spin polarization of-100% in CrO₂. It was estimated that the surface of CrO₂ has the insulator layer with the thickness of about 8~10[nm].

Keywords

atomic force microscopy; chromium compounds; ferromagnetic materials; giant magnetoresistance; iron alloys; magnetic multilayers; magnetic thin films; nickel alloys; spin polarised transport; tunnelling magnetoresistance; CrO₂-Ni₈₀Fe₂₀; TiO₂; chromium dioxide; conductive AFM; giant inverse tunneling magnetoresistance; half metallic ferromagnet; insulator layer; semiconductive spin bands; spin polarization; temperature 293 K to 298 K; Educational institutions; Force measurement; Insulation; Magnetic domains; Magnetic field measurement; Magnetic fields; Magnetic films; Magnetization; Temperature; Tunneling magnetoresistance;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2006. INTERMAG 2006. IEEE International

Conference_Location

San Diego, CA

Print_ISBN

1-4244-1479-2

Type

conf

DOI

10.1109/INTMAG.2006.375575

Filename

4261509