Applied Physics A

, Volume 27, Issue 3, pp 177–182 | Cite as

Magnetic torque behavior and rotational hysteresis of amorphous uniaxial Sm-Co alloy films

  • A. Nest
  • E. Kneller
  • V. Geiss
Contributed Papers

Abstract

Amorphous films of Sm100−xCo x with 70≦x≦90 were made by vapor deposition on flat glass substrates at 300 K with a magnetic field parallel to the film plane, as described in a preceding paper; the field induces a uniaxial anisotropyK u of the order 106 erg cm−3 with the easy axis,x, in the film plane. The film plane (xy plane) is the easy plane with a planar anisotropyK p of the order 107 erg cm−3, i.e. the film normal,z, is the hard axis. For such films, torque curvesT(H, Θ) (Θ: angle betweenH and an axis normal to the axis of rotation) are calculated, and are measured in fieldsH ≦ 30 kOe for the three axes of rotation,x, y, andz. The results are evaluated to give the “spontaneous magnetization”, 〈M〉, the anisotropies,K u ,K p , the rotational hysteresis losses,W Rx (H),W Ry (H),W Rz (H), and the rotational hysteresis integrals,R x ,R y ,R z .

PACS

75.30 

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References

  1. 1.
    V.Geiss, E.Kneller, A.Nest: Appl. Phys. A27, 79 (1981)Google Scholar
  2. 2.
    E.C.Stoner, E.P.Wohlfarth: Philos. Trans. R. Soc. (London) A240, 599 (1948)Google Scholar
  3. 3.
    S.Shtrikman, D.Treves: J. Phys. Rad.20, 286 (1959)Google Scholar
  4. 4.
    E.Kondorskij: J. Phys. USSR2, 161 (1940)Google Scholar
  5. 5.
    S.Shtrikman, E.P.Wohlfarth: J. Appl. Phys.32, Suppl., pp. 241 (1961)Google Scholar
  6. 6.
    C.P.Bean, W.H.Meiklejohn: Bull. Am. Phys. Soc. (Ser.II)1, 148 (1956)Google Scholar
  7. 7.
    I.S.Jacobs, F.E.Luborsky: J. Appl. Phys.28, 467 (1957)Google Scholar

Copyright information

© Springer-Verlag 1982

Authors and Affiliations

  • A. Nest
    • 1
  • E. Kneller
    • 1
  • V. Geiss
    • 1
  1. 1.Institut für Werkstoffe der ElektrotechnikRuhr-UniversitätBochumFed. Rep. Germany

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