Funct. Mater. 2020; 27 (1): 75-78.


Magnetoresistance features of bismuth films in inhomogeneous magnetic field

V.N.Samofalov, A.S.Aseyev

National Technical University "Kharkiv Polytechnic Institute", 2 Kyrpychova Str., 61002 Kharkiv, Ukraine


The magnetoresistance of vacuum-deposited bismuth films is studied in a high-gradient magnetic field. Bismuth films showed a large transverse magnetoresistance effect up Δρ/ρ0 ~ 70 %. Sensors in the shape of narrow rectangular stripes were made from the films. The fields were measured on a system of two Nd-Fe-B magnets which create large fields with a high gradient up to 106 Oe/cm. It was found that the magnitude of the magnetoresistance is affected by both the field strength and its gradient. It is shown that the discovered feature limits the possibility of using the bismuth films as sensors of high-strength fields.

bismuth films, high-gradient magnetic field, magnetoresistance, sensors of high-strength fields.
1. S.Tumanski. Handbook of Magnetic Measurements, CRC Press Taylor & Francis Group Roca Raton, London, New York (2011).
2. M.N.Baibich, J.M.Broto, A.Fert et al., Phys. Rev. Lett., 61, 2472 (1988).
3. P.Grunberg, R.Schreiber, Y.Pang et al., Phys. Rev. Lett., 57, 2442 (1986).
4. V.N.Samofalov, A.G.Ravlik, D.P.Belozorov et al., J. Magn. Magn. Mater., 281, 326 (2004).
5. V.N.Samofalov, D.P.Belozorov, A.G.Ravlik, Uspehi Fiz. Nauk, 56, 20 (2013).
6. V.N.Samofalov, D.P.Belozorov, A.G.Ravlik, FMM, 102, 527 (2006)
7. K.Halbach, J. Appl. Phys., 57, 3605 (1985).
8. G. Mare, K. Dransfeld, Strong and Ultrastrong Magnetic Fields and Their Applications, ed. by F. Herlach, Springer Verlag, Berlin - Heidelberg -New York - Tokyo (1985).
9. L.D.Landau, E.M.Lifshiz, Elektrodinamika Sploshnuh Sred, Fizmatlit (1995) [in Russian].

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