Pr4Ni3O10 trilayer nickelate muon-spin rotation at PSI Center for Neutron and Muon Sciences; Hydrostatic pressure suppresses SDW and Ni moment.
Multiple magnetic transitions in the trilayer nickelate Pr4Ni3O10 revealed by muon-spin rotation
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Multiple magnetic transitions in the trilayer nickelate Pr 4 Ni 3 O 10 revealed by muon-spin rotation
relaxation ( µ SR) study of the trilayer Ruddlesden–Popper nickelate Pr 4 Ni 3 O 10 was performed at ambient pressure and under hydrostatic pressure up to 2.2 GPa. Three magnetic transitions were identified at ambient pressure: the onset of spin-density-wave (SDW) order at T SDW ≃ 158 K, an intermediate-temperature transition at T ∗ ≃ 90–100 K, and a low-temperature transition at T SDW Pr ≃ 25–27 K. While the intermediate transition at T ∗ induces only minor changes in the internal-field distribution, the transition at T SDW Pr is accompanied by a pronounced reconstruction of the magnetic structure, consistent with previous reports attributing enhanced interlayer coherence to the ordering of the Pr sublattice. The high-temperature transition at T SDW is characterized by the sharp development of static internal magnetic fields with a narrow transition width of 0 . 65 ( 4 ) K. Weak-transverse-field measurements reveal a finite thermal hysteresis of 0 . 27 ( 6 ) K, with T SDW warming > T SDW cooling , indicating weakly first-order-like behavior. Hydrostatic pressure suppresses T SDW linearly and reduces the ordered Ni magnetic moment M , with corresponding rates of dT SDW
d p = − 4 . 9 ( 1 ) K
GPa and d ln M
d p = − 2 . 0 ( 5 ) × 10 −2 GPa −1 , respectively, thereby demonstrating a gradual weakening of the SDW instability under compression.
Reference: R. Khasanov, Superconductor Science and Technology 39 , 085020 (2026)
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