Ternary aluminides LnT2Al10 (Ln=Y, La–Nd, Sm, Gd–Lu andT=Fe, Ru, Os) with YbFe2Al10 type structure and magneticproperties of the iron-containing series

(Note: The full text of this document is currently only available in the PDF Version )

Verena M. T. Thiede, Thomas Ebel and Wolfgang Jeitschko


Abstract

Of the title compounds 25 have been prepared for the first time. They crystallize with the orthorhombic YbFe2Al10 type structure (Cmcm, Z=4), which was refined from single-crystal X-ray data of SmFe2Al10 [a=898.9(2), b=1018.6(2), c=904.3(2) pm, R=0.043 for 823 structure factors and 19 variable parameters] and LaOs2Al10 [a=920.5(6), b=1027.4(5), c=916.9(6) pm, R=0.047 for 1475 F values and 21 variables]. Two aluminium sites of LaOs2Al10 show significant deviations from the ideal occupancies, resulting in the exact composition LaOs2Al9.74(2) . The magnetic properties of the iron-containing compounds have been determined with a SQUID magnetometer in the temperature range 2–300 K with magnetic flux densities up to 5.5 T. YFe2Al10 and LaFe2Al10 are Pauli-paramagnetic, indicating that the iron atoms in these isotypic compounds do not carry magnetic moments. The behaviour of the other iron-containing compounds is dominated by the magnetic properties of the rare-earth components. CeFe2Al10 and YbFe2Al10 show mixed-valent behaviour. This can also be concluded from the cell volumes for CeRu2Al10 and YbRu2Al10 . SmFe2Al10 is Van Vleck paramagnetic, and the others follow the Curie–Weiss law with magnetic ordering temperatures of <20 K. The magnetic properties of these compounds were further investigated by magnetization measurements at 2 K.


References

  1. O. S. Zarechnyuk and P. I. Kripyakevich, Sov. Phys. Crystallogr., 1963, 7, 436 Search PubMed .
  2. H. R. Kirchmayer, Z. Metallkd., 1969, 60, 699 Search PubMed .
  3. K. H. J. Buschow, J. H. N. Van Vucht and W. W. Van den Hoogenhof, J. Less-Common Met., 1976, 50, 145 Search PubMed .
  4. I. Felner and I. Nowik, J. Phys. Chem. Solids, 1978, 39, 951 CrossRef CAS .
  5. I. Felner and I. Nowik, Solid State Commun., 1978, 28, 67 CrossRef CAS .
  6. I. Felner and I. Nowik, J. Phys. Chem. Solids, 1979, 40, 1035 CrossRef CAS .
  7. W. Schäfer and G. Will, J. Less-Common Met., 1983, 94, 205 Search PubMed .
  8. W. Suski, J. Alloys Compd., 1995, 223, 237 CrossRef CAS .
  9. I. Felner, J. Less-Common Met., 1980, 72, 241 Search PubMed .
  10. W. Zarek and A. Winiarska, J. Less-Common Met., 1988, 141, 321 Search PubMed .
  11. P. Villars and L. D. Calvert, Pearson's Handbook of Crystallographic Data for Intermetallic Phases, The Materials Information Society, Materials Park, OH, 1991 Search PubMed .
  12. S. Niemann and W. Jeitschko, Z. Kristallogr., 1995, 10, 338 .
  13. O. S. Zarechnyuk, E. I. Emes-Misenko, V. R. Ryabov and I. I. Dikii, Izv. Akad. Nauk SSSR, Metal., 1968, 219 Search PubMed .
  14. O. I. Vivchar, O. S. Zarechnyuk and V. R. Ryabov, Izv. Akad. Nauk SSSR, Metal., 1970, 211 Search PubMed .
  15. V. R. Ryabov, O. S. Zarechnyuk, D. M. Rabkin and O. I. Vivchar, Avtomat. Svarka, 1971, 24, 76 Search PubMed .
  16. O. S. Zarechnyuk, R. M. Rykhal, V. R. Ryabov and O. I. Vivchar, Izv. Akad. Nauk SSSR, Metal., 1972, 208 Search PubMed .
  17. O. S. Zarechnyuk, O. I. Vivchar and V. R. Ryabov, Visn. L'viv Univ., Ser. Khim., 1972, No. 14 Search PubMed .
  18. O. I. Vivchar, O. S. Zarechnyuk and V. R. Ryabov, Dopov. Akad. Nauk Ukr. RSR, Ser. A, 1973, 35, 1040 Search PubMed .
  19. O. I. Vivchar, O. S. Zarechnyuk and V. R. Ryabov, Dopov. Akad. Nauk Ukr. RSR, Ser. A, 1973, 35, 159 Search PubMed .
  20. O. I. Vivchar, O. S. Zarechnyuk and V. R. Ryabov, Dopov. Akad. Nauk Ukr. RSR, Ser. A, 1974, 36, 363 Search PubMed .
  21. L. Angers, Diss. Abstr. Intern., 1986, 46 Search PubMed  No. DA 8600847.
  22. H. Klesnar and P. Rogl, J. Mater. Res., 1991, 6, 53 CAS .
  23. S. Niemann, Doctoral Thesis, Universität Münster, 1994 .
  24. D. T. Cromer and J. B. Mann, Acta Crystallogr., Sect. A, 1968, 24, 321 CrossRef CAS .
  25. D. T. Cromer and D. Liberman, J. Chem. Phys., 1970, 53, 1891 CrossRef CAS .
  26. M. Reehuis, T. Vomhof and W. Jeitschko, J. Less-Common Met., 1991, 169, 139 Search PubMed .
  27. K. Zeppenfeld, R. Pöttgen, M. Reehuis, W. Jeitschko and R. K. Behrens, J. Phys. Chem. Solids, 1993, 54, 257 CrossRef CAS .
  28. J. Donohue, The Structures of the Elements, Wiley, New York, 1974 Search PubMed .
  29. S. Legvold, Ferromagnetic Materials, ed. E. P. Wohlfarth, North Holland, Amsterdam, 1980, vol. 1, pp. 183–295 Search PubMed .
  30. J. M. Lawrence, P. S. Riseborough and R. D. Parks, Rep. Prog. Phys., 1981, 44, 1 CrossRef .
  31. J. H. van Vleck, The Theory of Electric and Magnetic Susceptibilities, Oxford University Press, London, 1932 Search PubMed .
Click here to see how this site uses Cookies. View our privacy policy here.