Theoretical model for torque differential magnetometry of single-domain magnets

Kamra, Akashdeep; Schreier, Michael; Huebl, Hans; Goennenwein, Sebastian T. B.

Theoretical model for torque differential magnetometry of single-domain magnets

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Datum

2014

Autor:innen

Kamra, Akashdeep

Schreier, Michael

Huebl, Hans

Goennenwein, Sebastian T. B.

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review B. American Physical Society (APS). 2014, 89(18), 184406. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.89.184406

Zusammenfassung

We present a generic theoretical model for torque differential magnetometry (TDM)—an experimental method for determining the magnetic properties of a magnetic specimen by recording the resonance frequency of a mechanical oscillator, on which the magnetic specimen has been mounted, as a function of the applied magnetic field. The effective stiffness change, and hence the resonance frequency shift, of the oscillator due to the magnetic torque on the specimen is calculated, treating the magnetic specimen as a single magnetic domain. Our model can deal with an arbitrary magnetic free-energy density characterizing the specimen, as well as any relative orientation of the applied magnetic field, the specimen, and the oscillator. Our calculations agree well with published experimental data. The theoretical model presented here allows one to take full advantage of TDM as an efficient magnetometry method.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

KAMRA, Akashdeep, Michael SCHREIER, Hans HUEBL, Sebastian T. B. GOENNENWEIN, 2014. Theoretical model for torque differential magnetometry of single-domain magnets. In: Physical Review B. American Physical Society (APS). 2014, 89(18), 184406. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.89.184406

BibTex

@article{Kamra2014-03-27T15:54:53ZTheor-52413,
  year={2014},
  doi={10.1103/PhysRevB.89.184406},
  title={Theoretical model for torque differential magnetometry of single-domain magnets},
  number={18},
  volume={89},
  issn={2469-9950},
  journal={Physical Review B},
  author={Kamra, Akashdeep and Schreier, Michael and Huebl, Hans and Goennenwein, Sebastian T. B.},
  note={Article Number: 184406}
}

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