Stabilization of the Polarity of (NdSmDy)(FeCo)B Permanent Magnets for Application in Magnetic Undulators

  • S. A. Kostyuchenko
  • A. A. Filatov
  • A. I. Dmitriev


The temperature dependences of the magnetization of polycrystalline samples of (NdSmDy)(FeCo)B sintered permanent magnets are measured in various magnetic fields by a SQUID magnetometer. Near T = 110 K, the spin-reorientation transition occurs. Bistable magnetic states with two equally possible orientations of the magnetization vector corresponding to different polarities of the permanent magnet are formed in the samples near the spin-reorientation transition. The polarity of the sintered magnets can be stabilized by a small external magnetic field of ∼250 Oe. It provides new possibilities for the application of these magnets in cryomagnetic systems such as magnetic undulators.


NdFeB sintered magnets intermetallics spin-reorientation transition 


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© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • S. A. Kostyuchenko
    • 1
  • A. A. Filatov
    • 1
  • A. I. Dmitriev
    • 2
  1. 1.Moscow State UniversityMoscowRussia
  2. 2.Institute of Problems of Chemical PhysicsRussian Academy of SciencesChernogolovka, Moscow oblastRussia

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