Magnetoresistance in Cobalt Whiskers
- 15 March 1971
- journal article
- conference paper
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 42 (4) , 1338-1340
- https://doi.org/10.1063/1.1660243
Abstract
Measurements of magnetoresistance in cobalt whiskers with residual resistance ratios up to 400 have been made in the temperature range 1°–4.2°K and in magnetic fields up to 80 kOe. Field dependence curves give evidence of magnetic breakdown above 65 kOe for certain field and current orientations. Shubnikov‐deHaas oscillations in the longitudinal magnetoresistance indicate the existence of small pockets of the Fermi surface that contribute directly to the oscillatory magnetoresistance with periods of 9.3×10−7 G−1, 2.8×10−7 G−1, and 8.6×10−8 G−1, respectively. The larger period of 9.3×10−7 G−1 is in approximate agreement with the period observed by Reed and Fawcett in the transverse oscillatory magnetoresistance above 70 kOe. The temperature dependence of resistivity in the range 1°–4.2°K at H̄=0 is given by ρ∝αT2 with α=15×10−12 Ω cm/deg2. At 50 kOe the coefficient of the T2 coefficient increases by 33%.This publication has 3 references indexed in Scilit:
- Electron-Electron Scattering in Transition MetalsPhysical Review Letters, 1968
- Ferromagnetic Domains in Thin Single-Crystal Nickel PlateletsJournal of Applied Physics, 1965
- Electrical and thermal resistivity of the transition elements at low temperaturesPhilosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1959