Magnetic materials featuring triangular arrangements of spins are frequently investigated as platforms hosting magnetic frustration. Hexagonal perovskites with ordered vacancies serve as excellent candidates for two-dimensional triangular magnetism due to the considerable separation of the magnetic planes. In this work, the effects of chemical pressure on the ferromagnetic ground state of BaLaNiWO by substitution of Ba with Sr to produce SrLaNiWO are investigated. The two materials are characterized using synchrotron-based XRD, XANES and EXAFS in addition to magnetometry in order to correlate their crystal structures and magnetic properties. Both materials form in space group R3, yet as a result of the enhanced bending of key bond angles due to the effects of chemical pressure, the T value of the magnetic Ni sublattice is reduced from ∼6 K in BaLaNiWO to 4 K in SrLaNiWO.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11457098 | PMC |
| http://dx.doi.org/10.1107/S2052520624007091 | DOI Listing |
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