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. 2024 Oct 1;80(Pt 5):443-450.
doi: 10.1107/S205252062400862X. Epub 2024 Sep 30.

The magnetic structure and spin-reorientation of ErGa

J M Cadogan  1 , D H Ryan  2 , R A Susilo  1 , S Muñoz Pérez  1 , R Cobas  1 , N R Lee-Hone  2 , B R Hansen  3 , M Avdeev  4
Affiliations

The magnetic structure and spin-reorientation of ErGa

J M Cadogan et al. Acta Crystallogr B Struct Sci Cryst Eng Mater. .

Abstract

The magnetic structure of the intermetallic compound ErGa has been determined using high-resolution neutron powder diffraction. This compound crystallizes in the orthorhombic (Cmcm, No. 63) CrB-type structure and orders ferromagnetically at 32 (2) K, with the Er moments initially aligned along the b axis. Upon cooling below 16 K, the Er magnetic moments cant away from the b axis towards the c axis. At 3 K, the Er moment is 8.7 (3) μB and the Er magnetic moments point in the direction 31 (3)° away from the crystallographic b axis, within the bc plane. 166Er Mössbauer spectroscopy work supports this structure and shows clear signals of the spin-reorientation in both the magnetic and electric quadrupole hyperfine interactions.

Keywords: Mössbauer spectroscopy; magnetic structures; neutron diffraction; rare-earth intermetallics.

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