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Magnetism on the stretched diamond lattice in lanthanide orthotantalates

Abstract:
The magnetic lanthanide (Ln3+) ions in the fergusonite and scheelite crystal structures form a distorted or stretched diamond lattice which is predicted to host exotic magnetic ground states. In this study, polycrystalline samples of the fergusonite orthotantalates M−LnTaO4 (Ln = Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er) were synthesized and then characterized using powder diffraction and bulk magnetometry and heat capacity. TbTaO4 orders antiferromagnetically at 2.25 K into a commensurate magnetic cell with →k=0, magnetic space group 14.77 (P2′1/c), and Tb moments parallel to the a axis. No magnetic order was observed in the other materials studied, leaving open the possibility of exotic magnetic states at T<2 K.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/PhysRevMaterials.6.044410

Authors


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Institution:
University of Oxford
Division:
MPLS
Department:
Chemistry
Sub department:
Inorganic Chemistry
Role:
Author
ORCID:
0000-0003-2861-1623


Publisher:
American Physical Society
Journal:
Physical Review Materials More from this journal
Volume:
6
Issue:
4
Article number:
44410
Publication date:
2022-04-25
Acceptance date:
2022-04-06
DOI:
EISSN:
2475-9953


Language:
English
Keywords:
Pubs id:
1261158
Local pid:
pubs:1261158
Deposit date:
2022-11-11

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