Magnetoresistance of ordered (Pd/sub x/Pt/sub 1-x/)/sub 3/Fe alloys in fields up to 150 kG
The longitudinal (..delta..rho/sub parallel//rho/sub 0/) and transverse (..delta..rho/sub perpendicular//rho/sub 0/) magnetoresistances of atomically ordered (Pd/sub x/Pt/sub 1-x/)/sub 3/Fe alloys are studied in magnetic fields of up to 150 kG. The magnetoresistance of the ferromagnetic Pd/sub 3/Fe is shown to obey the well-known rules for even galvanomagnetic effects. In the antiferromagnetic Pt/sub 3/Fe the longitudinal and transverse magnetoresistances are positive and are proportional to H/sup 3/2/ for fields in the range 30<150 kG at T = 4.2 K. The dependence ..delta..rho/sub perpendicular//rho/sub 0/(H) is explained in terms of the Lorentz mechanism. The ..delta..rho/sub perpendicular//rho/sub 0/ effect in the given case is assumed to be due to the curvature of the lines of flux in the specimen because of the inhomogeneity of the specimen or is due to a change in the parameters of the electron spectrum when a strong magnetic field is applied. In the region of the concentration phase transitions, ferromagnetic--paramagnetic at T = 300 K and ferromagnetic--antiferromagnetic at T = 4.2 K, the magnetoresistance is due mainly to a ''paraprocess'' component which is negative and attains its maximum at the critical concentration x/sub c/approx.0.5.
- Research Organization:
- Institute of Metal Physics, Ural Scientific Center, Academy of Sciences of the USSR, Sverdlovsk
- OSTI ID:
- 6100539
- Journal Information:
- Sov. J. Low Temp. Phys. (Engl. Transl.); (United States), Vol. 11:2
- Country of Publication:
- United States
- Language:
- English
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