Creat membership Creat membership
Sign in

Forgot password?

Confirm
  • Forgot password?
    Sign Up
  • Confirm
    Sign In
Creat membership Creat membership
Sign in

Forgot password?

Confirm
  • Forgot password?
    Sign Up
  • Confirm
    Sign In
Collection
For ¥0.57 per day, unlimited downloads CREATE MEMBERSHIP Download

toTop

If you have any feedback, Please follow the official account to submit feedback.

Turn on your phone and scan

home > search >

Synthesis,crystal and electronic structures,physical properties and Sb-121 and Eu-151 Mossbauer spectroscopy of the alumo-antimonide Zintl-phase Eu5Al2Sb6

Author:
Radzieowski, Mathis  Block, Theresa  Fickenscher, Thomas  Zhang, Yuemei  Fokwa, Boniface P. T.  Janka, Oliver  


Journal:
MATERIALS CHEMISTRY FRONTIERS


Issue Date:
2017


Abstract(summary):

Eu5Al2Sb6 was synthesized from the elements in niobium ampoules. It crystallizes in the orthorhombic crystal system (a =3D 1027.55(7), b =3D 1200.28(6), c =3D 1324.22(7) pm) with space group Pnma (no. 62), isostructural to Sr5Al2Sb6, and can be described as a Zintl phase. The Al atoms are tetrahedrally surrounded by Sb atoms, forming branched strands. Besides Sb3- anions, antimony Sb-2(-4) dumbbells can also be found in the crystal structure. (EuAlSb6)-Al-5-Sb-2 [equivalent to(Eu2+)(5)(Al3+)(2)(Sb3 -)(4)(Sb-2(4-))] exhibits three magnetic ordering phenomena at T-1 =3D 12.3(1), T-2 =3D 10.6(1) and T-3 =3D 3.0(1) K, obtained by heat capacity measurements. While T-3 is of antiferromagnetic nature, T1 and T2 correspond to canted antiferromagnetic transitions. Resistivity investigations indicate that the title compound is a semiconductor, in line with the band structure calculations. Spin exchange parameters, calculated using mapping analysis, confirm that the magnetic phase transition at T-N =3D 3.5(1) is associated with the ordering of Eu1 atoms. The divalent character has been confirmed by Eu-151 Moussbauer spectroscopic studies. Measurements conducted at 5 K show a hyperfine field splitting for two of the three Eu sites, underlining the magnetic data. Additionally, Sb-121 Moussbauer spectroscopic studies have been conducted on Eu5Al2Sb6 and isostructural Sr5Al2Sb6.


Page:
1563---1572


VIEW PDF

The preview is over

If you wish to continue, please create your membership or download this.

Create Membership

Similar Literature

Submit Feedback

This function is a member function, members do not limit the number of downloads