论文信息 - Enhanced intergrain tunneling magnetoresistance in half-metallic CrO2 films

Enhanced intergrain tunneling magnetoresistance in half-metallic CrO2 films

Low-field tunneling magnetoresistance was observed in films of half-metallic CrO2 that were grown by high-pressure thermal decomposition of CrO3. High-temperature annealing treatments modified the intergrain barriers of the as-grown films through surface decomposition of CrO2 into insulating Cr2O3, which led to a threefold enhancement of the low-field magnetoresistance. This enhancement indicates the potential of this simple method to directly control the interface barrier characteristics that determine the magnetotransport properties.

Hwang | Cheong | H. Hwang | S. Cheong

[1] C. Nordman,et al. CRITICAL CURRENT SUPPRESSION IN A SUPERCONDUCTOR BY INJECTION OF SPIN-POLARIZED CARRIERS FROM A FERROMAGNET , 1997 .

[2] Y. Tomioka,et al. Interplane Tunneling Magnetoresistance in a Layered Manganite Crystal , 1996, Science.

[3] W. Gallagher,et al. Observation of large low‐field magnetoresistance in trilayer perpendicular transport devices made using doped manganate perovskites , 1996 .

[4] Hwang,et al. Spin-Polarized Intergrain Tunneling in La2/3Sr1/3MnO3. , 1996, Physical review letters.

[5] P. Levy. Giant Magnetoresistance in Magnetic Layered and Granular Materials , 1992 .

[6] H. Güntherodt,et al. Observation of vacuum tunneling of spin-polarized electrons with the scanning tunneling microscope. , 1990, Physical review letters.

[7] Güntherodt,et al. CrO2-a new half-metallic ferromagnet? , 1987, Physical review letters.

[8] K. Schwarz,et al. CrO2 predicted as a half-metallic ferromagnet , 1986 .

[9] K.H.J. Buschow,et al. New Class of Materials: Half-Metallic Ferromagnets , 1983 .

[10] B. Chamberland. The chemical and physical properties of CrO2and tetravalent chromium oxide derivatives , 1977 .

[11] D. Rodbell,et al. Electrical Resistivity of Single Crystal CrO 2 , 1966 .

[12] J. Honig,et al. Electrical Properties of Ferromagnetic CrOx (1.89 < x < 2.02) , 1965 .

[13] Buichi Kubota,et al. Electrical Resistivity of Ferromagnetic Chromium Dioxide , 1961 .