TY  - JOUR
AU  - Mauws, C.
AU  - Hiebert, N.
AU  - Rutherford, M. L.
AU  - Zhou, H. D.
AU  - Huang, Q.
AU  - Stone, M. B.
AU  - Butch, N. P.
AU  - Su, Yixi
AU  - Choi, E. S.
AU  - Yamani, Z.
AU  - Wiebe, C. R.
TI  - Magnetic ordering in the Ising antiferromagnetic pyrochlore Nd 2 ScNbO 7
JO  - Journal of physics / Condensed matter
VL  - 33
IS  - 24
SN  - 1361-648X
CY  - Bristol
PB  - IOP Publ.
M1  - FZJ-2021-02156
SP  - 245802 -
PY  - 2021
AB  - The question of structural disorder and its effects on magnetism is relevant to a number of spin liquid candidate materials. Although commonly thought of as a route to spin glass behaviour, here we describe a system in which the structural disorder results in long-range antiferromagnetic order due to local symmetry breaking. Nd2ScNbO7 is shown to have a dispersionless gapped excitation observed in other neodymium pyrochlores below TN = 0.37 K through polarized and inelastic neutron scattering. However the dispersing spin waves are not observed. This excited mode is shown to occur in only 14(2)% of the neodymium ions through spectroscopy and is consistent with total scattering measurements as well as the magnitude of the dynamic moment 0.26(2) μB. The remaining magnetic species order completely into the all-in all-out Ising antiferromagnetic structure. This can be seen as a result of local symmetry breaking due disordered Sc+3 and Nb+5 ions about the A-site. From this work, it has been established that B-site disorder restores the dipole-like behaviour of the Nd+3 ions compared to the Nd2B2O7 parent series.
LB  - PUB:(DE-HGF)16
C6  - 33827056
UR  - <Go to ISI:>//WOS:000649934700001
DO  - DOI:10.1088/1361-648X/abf594
UR  - https://juser.fz-juelich.de/record/892557
ER  -