Pressure-induced incommensurate antiferromagnetic order in a ferromagnetic B-site ordered double-perovskite Lu2NiMnO6 - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review B Année : 2020

Pressure-induced incommensurate antiferromagnetic order in a ferromagnetic B-site ordered double-perovskite Lu2NiMnO6

Résumé

We have investigated the pressure effect on magnetic ordering of the ferromagnetic double perovskite Lu 2 NiMnO 6 by magnetization, ac magnetic susceptibility, and neutron diffraction experiments up to 8.0 GPa in order to understand the ferromagnetic-to-antiferromagnetic phase transition by substitution of the A sites in A 2 NiMnO 6 from rare-earth to indium or scandium ions. Strong ferromagnetic spin correlation seen in the susceptibility at low pressure is significantly suppressed by increasing pressure. In a neutron diffraction experiment, the magnetic Bragg reflections associated with ferromagnetic ordering disappear above 4.5 GPa. For the high-pressure region above 4.5 GPa, an antiferromagnetic ordering with long-period incommensurate modulation appears, which is coexistent with ferromagnetic short-range order. From mean-field calculations, we infer that pressure modification of the delicate balance of the competing next-nearest-neighbor exchange interactions between Ni and Ni, or Mn and Mn, plays an important role in the phase transition from ferromagnetic to antiferromagnetic ordering in A 2 NiMnO 6 .
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hal-04143373 , version 1 (27-06-2023)

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Noriki Terada, Claire Colin, Navid Qureshi, Thomas C Hansen, Kazuyuki Matsubayashi, et al.. Pressure-induced incommensurate antiferromagnetic order in a ferromagnetic B-site ordered double-perovskite Lu2NiMnO6. Physical Review B, 2020, 102 (9), pp.094412. ⟨10.1103/physrevb.102.094412⟩. ⟨hal-04143373⟩

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