TY - JOUR
T1 - Magnetoresistance of an insulating amorphous nickel-silicon film in large magnetic fields
AU - Rosenbaum, R.
AU - Milner, A.
AU - Hannahs, S.
AU - Murphy, T.
AU - Palm, E.
AU - Brandt, B.
N1 - Funding Information:
We thank Dr. M. Karpovski for preparing the films. A portion of this work was performed at the NHMFL, which is supported by the NSF Cooperative Agreement No. DMR-9527035 and by the State of Florida. We thank the Tel Aviv University Internal Research Fund for financial assistance.
PY - 2001/1
Y1 - 2001/1
N2 - High magnetic field measurements for the magnetoresistance ratios R(B, T)/R(0, T) have been made on an insulating amorphous nickel-silicon thin film. In zero field, the resistance of this insulating film exhibits a `soft gap' variable-range hopping law in the liquid helium temperature region. In small fields, negative magnetoresistance values are observed, which can be explained using the forward interference (orbital momentum) theory. In intermediate and large fields, the magnetoresistance is positive and large and can be explained using the wave function shrinkage theory. A phenomenological model incorporating both processes gives very acceptable fits to the experimental data.
AB - High magnetic field measurements for the magnetoresistance ratios R(B, T)/R(0, T) have been made on an insulating amorphous nickel-silicon thin film. In zero field, the resistance of this insulating film exhibits a `soft gap' variable-range hopping law in the liquid helium temperature region. In small fields, negative magnetoresistance values are observed, which can be explained using the forward interference (orbital momentum) theory. In intermediate and large fields, the magnetoresistance is positive and large and can be explained using the wave function shrinkage theory. A phenomenological model incorporating both processes gives very acceptable fits to the experimental data.
UR - http://www.scopus.com/inward/record.url?scp=0035062238&partnerID=8YFLogxK
U2 - 10.1016/S0921-4526(00)00673-6
DO - 10.1016/S0921-4526(00)00673-6
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AN - SCOPUS:0035062238
SN - 0921-4526
VL - 294-295
SP - 340
EP - 342
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
ER -