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Relationship between A-site cation and magnetic structure in $3 d − 5 d − 4 f$ double perovskite iridates $L n_{2} {NiIrO}_{6}$ ( $L n = La$ , Pr, Nd)

https://doi.org/10.1103/PhysRevMaterials.5.064408

Ferreira, T.; Calder, S.; Parker, D. S.; Upton, M. H.; Sefat, A. S.; Loye, H.-C. zur (June 2021, Physical Review Materials)

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Magnetic properties of the Ising-like rare earth pyrosilicate: D-Er ₂ Si ₂ O ₇

https://doi.org/10.1088/1361-648X/ac136a

Hester, Gavin; DeLazzer, T N; Yahne, D R; Sarkis, C L; Zhao, H D; Rivera, J A; Calder, S; Ross, K A (August 2021, Journal of Physics: Condensed Matter)

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Collective excitations in the tetravalent lanthanide honeycomb antiferromagnet ${Na}_{2} \Pr O_{3}$

https://doi.org/10.1103/PhysRevB.103.L121109

Daum, M. J.; Ramanathan, A.; Kolesnikov, A. I.; Calder, S.; Mourigal, M.; La Pierre, H. S. (March 2021, Physical Review B)
null (Ed.)
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Structural, electronic, and magnetic properties of nearly ideal $J_{e f f} = \frac{1}{2}$ iridium halides

https://doi.org/10.1103/PhysRevMaterials.4.124407

Reig-i-Plessis, D.; Johnson, T. A.; Lu, K.; Chen, Q.; Ruff, J. P.; Upton, M. H.; Williams, T. J.; Calder, S.; Zhou, H. D.; Clancy, J. P.; et al (December 2020, Physical Review Materials)
null (Ed.)
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Dynamical ground state in the XY pyrochlore Yb2GaSbO7

https://doi.org/10.1038/s41535-021-00343-4

Sarte, P. M.; Cruz-Kan, K.; Ortiz, B. R.; Hong, K. H.; Bordelon, M. M.; Reig-i-Plessis, D.; Lee, M.; Choi, E. S.; Stone, M. B.; Calder, S.; et al (December 2021, npj Quantum Materials)

Abstract The magnetic ground state of the pyrochlore Yb 2 GaSbO 7 has not been established. The persistent spin fluctuations observed by muon spin-relaxation measurements at low temperatures have not been adequately explained for this material using existing theories for quantum magnetism. Here we report on the synthesis and characterisation of Yb 2 GaSbO 7 to revisit the nature of the magnetic ground state. Through DC and AC magnetic susceptibility, heat capacity, and neutron scattering experiments, we observe evidence for a dynamical ground state that makes Yb 2 GaSbO 7 a promising candidate for disorder-induced spin-liquid or spin-singlet behaviour. This state is quite fragile, being tuned to a splayed ferromagnet in a modest magnetic field μ 0 H c ~ 1.5 T.
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