From antiferromagnetism to high-Tc weak ferromagnetism manipulated by atomic 
rearrangement in Ba3NiOs2O9

Feng, Hai L.; Chen, Jie; Hu, Zhiwei; Wang, Xiao; Reehuis, Manfred; Adler, Peter; Hoser, Andreas; Wu, Mei-Xia; Agrestini, Stefano; Vasili, Hari Babu; Herrero-Martin, J.; Nataf, Lucie; Baudelet, Francois; Chen, Kai; Matsushita, Yoshitaka; Li, Man-Rong; Tjeng, Liu Hao; Felser, Claudia; Jansen, Martin; Yamaura, Kazunari

doi:10.1103/PhysRevMaterials.4.064420

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From antiferromagnetism to high-T_c weak ferromagnetism manipulated by atomic rearrangement in Ba₃NiOs₂O₉

MPG-Autoren

/persons/resource/persons199484

Feng, Hai L.
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126666

Hu, Zhiwei
Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons246356

Wang, Xiao
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126506

Adler, Peter
Peter Adler, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126507

Agrestini, Stefano
Stefano Agrestini, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126881

Tjeng, Liu Hao
Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126601

Felser, Claudia
Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126670

Jansen, Martin
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zitation

Feng, H. L., Chen, J., Hu, Z., Wang, X., Reehuis, M., Adler, P., et al. (2020). From antiferromagnetism to high-T_c weak ferromagnetism manipulated by atomic rearrangement in Ba₃NiOs₂O₉. Physical Review Materials, 4(6): 064420, pp. 1-9. doi:10.1103/PhysRevMaterials.4.064420.

Zitierlink: https://hdl.handle.net/21.11116/0000-0006-CAFD-A

Zusammenfassung

Polycrystalline samples of Ba3NiOs2O9 were synthesized at ambient pressure (AP) and high pressure (HP) conditions, respectively. Both samples are electrically semiconducting. The AP Ba3NiOs2O9 crystallizes in the 6 H perovskite structure with space group P6(3)/mmc , consisting of face-sharing Os2O9 dimer units and corner-sharing NiO6 octahedra. Magnetic measurements indicated that AP Ba3NiOs2O9 is antiferromagnetically ordered below 130 K. HP Ba3NiOs2O9 crystallizes in the 6H perovskite structure too, but the face-sharing octahedral sites appear to be occupied by both Ni2+ and Os5+ ions, whereas the corner-sharing site is occupied exclusively by Os5+ . HP Ba3NiOs2O9 undergoes a high-temperature (approximate to 400 K) weak ferromagnetic transition, which is much different from the antiferromagnetism of the AP phase. The long-range magnetic order of HP Ba3NiOs2O9 was confirmed by neutron powder diffraction. X-ray magnetic circular dichroism analysis supported ferromagnetic coupling between Os and Ni moments which leads to a spin arrangement, where the ferromagnetic moments mainly arise from Ni2+ ions.