FeWO4 Single Crystals: Structure, Oxidation States, and Magnetic and Transport 
Properties

Maignan, Antoine; Schmidt, Marcus; Prots, Yurii; Lebedev I, Oleg; Daou, Ramzy; Chang, Chun-Fu; Kuo, Chang-Yang; Hu, Zhiwei; Chen, Chien-Te; Weng, Shih-Chang; Altendorf, Simone G.; Tjeng, Liu-Hao; Grin, Yuri

doi:10.1021/acs.chemmater.1c03640

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FeWO₄ Single Crystals: Structure, Oxidation States, and Magnetic and Transport Properties

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Schmidt, Marcus
Marcus Schmidt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Prots, Yurii
Yuri Prots, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Chang, Chun-Fu
Chun-Fu Chang, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126717

Kuo, Chang-Yang
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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

/persons/resource/persons126515

Altendorf, Simone G.
Simone Altendorf, 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/persons126626

Grin, Yuri
Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Maignan, A., Schmidt, M., Prots, Y., Lebedev I, O., Daou, R., Chang, C.-F., et al. (2022). FeWO₄ Single Crystals: Structure, Oxidation States, and Magnetic and Transport Properties. Chemistry of Materials, 34(2), 789-797. doi:10.1021/acs.chemmater.1c03640.

Cite as: https://hdl.handle.net/21.11116/0000-000A-0F59-3

Abstract

Synthetic crystals of the ferberite FeWO4 have been grown by the chemical transport reaction starting from a polycrystalline sample of this phase. Magnetic susceptibility measurements showed an antiferromagnetic Neel temperature of T-N = 75 K. The anisotropy in the magnetic susceptibility can be ascribed to the magnetocrystalline anisotropy of the Fe2+ ion, the oxidation state of which was confirmed by X-ray absorption spectroscopy. While X-ray photoemission analysis indicated that all W ions are in the expected 6+ charge state, the dielectric permittivity of the FeWO4 crystals was found to be leaky, hindering changes at T-N to be detected. Subsequent thermoelectric power measurements suggested the presence of about 1.5% Fe3+. X-ray diffraction experiments confirmed the basic crystal structure of the wolframite type and revealed some structural disorder in the 1% range. Transmission electron microscopy allowed us to unveil the occurrence of stacking faults attributed to the similarity of the atomic environment of the Fe and W species.