Hyperfine Interactions

, 237:47 | Cite as

Mössbauer study of the magnetocaloric compound AlFe2 B 2

  • Johan Cedervall
  • Lennart Häggström
  • Tore Ericsson
  • Martin Sahlberg
Article
Part of the following topical collections:
  1. Proceedings of the International Conference on the Applications of the Mössbauer Effect (ICAME 2015), Hamburg, Germany, 13-18 September 2015

Abstract

Mössbauer spectroscopy in the ferromagnetic AlFe2 B 2 reveals Tc=299 K and shows good agreement with magnetic measurements. The crystals are plate-shaped. The flakes are found from X-ray diffraction to be in the crystallographic ac-plane in the orthorhombic system. The axes of the principle electric field gradient tensor are, by symmetry, colinear with the crystal a-, b- and c-axes. By using information about the quadrupole splitting and line asymmetry in the paramagnetic regime together with the quadrupole shift of the resonance lines in the ferromagnetic regime the magnetic hyperfine field direction is found to be in the ab-plane having an angle =40° to the b-axis.

Keywords

Mössbauer spectroscopy Magnetocaloric material 

References

  1. 1.
    Gschneidner, K.A Jr, Pecharsky, V.K.: Int. J. Refrig 31, 945 (2008)CrossRefGoogle Scholar
  2. 2.
    El Massalami, M., Oliviera, D.da.S., Takeya, H.: J. Magn. Magn. Mater 323, 2133 (2011)ADSCrossRefGoogle Scholar
  3. 3.
    Chai, P., Stoian, S.A., Tan, X., Dube, P.A., Shatruk, M.: J. Sol. St. Chem 224, 50 (2015)ADSCrossRefGoogle Scholar
  4. 4.
    Tan, X., Chai, P., Thompson, C.M., Shatruk, M.: J. of Am. Chem. Soc 135, 52 (2013)Google Scholar
  5. 5.
    Rietveld, H.M.: J. Appl. Cryst. 2(Pt. 2), 65 (1969)CrossRefGoogle Scholar
  6. 6.
    Rodríguez-Carvajal, J.: Physica B: Cond. Matter 192(1–2), 55 (1993)ADSCrossRefGoogle Scholar
  7. 7.
    Jeitschko, W.: Acta Cryst. B 25(1), 163 (1969)CrossRefGoogle Scholar
  8. 8.
    Ericsson, T., Wäppling, R.: J. de Physique 37, C6–719 (1976). ColloqueGoogle Scholar
  9. 9.
    Zory, P.: Phys. Rev. 140, A1401 (1965)ADSCrossRefGoogle Scholar
  10. 10.
    Williams, J.M., Brooks, J.S.: Nucl. Instr. and Meth. 128, 363 (1975)ADSCrossRefGoogle Scholar
  11. 11.
    Kamali, S., Häggström, L., Sahlberg, M., Wäppling, R.: J. Phys. Condens. Matter 23, 55301 (2011)ADSCrossRefGoogle Scholar

Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  1. 1.Department of Chemistry – Ångström LaboratoryUppsala UniversityUppsalaSweden

Personalised recommendations