Crystal Structure, Transport, and Magnetic Properties of an Ir6+ Compound Ba8Al2IrO14

Yang, Lin; Pisoni, Andrea; Magrez, Arnaud; Katrych, Sergiy; Arakcheeva, Alla; Dalla Piazza, Bastien; Prša, Krunoslav; Jacimovic, Jacim; Akrap, Ana; Teyssier, Jérémie; Forró, László; Rønnow, Henrik M.

doi:10.1021/acs.inorgchem.5b00157

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Title		Crystal Structure, Transport, and Magnetic Properties of an Ir⁶⁺ Compound Ba₈Al₂IrO₁₄
Authors		Yang, Lin Pisoni, Andrea Magrez, Arnaud Katrych, Sergiy Arakcheeva, Alla Dalla Piazza, Bastien Prša, Krunoslav Jacimovic, Jacim Akrap, Ana Teyssier, Jérémie Forró, László Rønnow, Henrik M. show all authors [1 - 12]
Published in		Inorganic Chemistry. 2015, vol. 54, no. 9, p. 4371-4376
Abstract		The novel iridate Ba8Al2IrO14 was prepared as single crystals by self-flux method, thereby providing a rare example of an all-Ir(VI) compound that can be synthesized under ambient pressure conditions. The preparation of all-Ir6+ iridate without using traditional high-pressure techniques has to our knowledge previously only been reported in Nd2K2IrO7 and Sm2K2IrO7. The monoclinic crystal structure (space group C2/m, No.12) is stable down to 90 K and contains layers of IrO6 octahedra separated by Ba and AlO4 tetrahedra. The material exhibits insulating behavior with a narrow band gap of ∼0.6 eV. The positive Seebeck coefficient indicates hole-like dominant charge carriers. Susceptibility measurement shows antiferromagnetic coupling with no order down to 2 K.
Identifiers		DOI: 10.1021/acs.inorgchem.5b00157
Full text		Article (Published version) (2.1 MB) - Limited access to UNIGE
Structures		Faculté des sciences / Section de physique / Département de physique de la matière quantique
Citation (ISO format)		YANG, Lin et al. Crystal Structure, Transport, and Magnetic Properties of an Ir⁶⁺ Compound Ba₈Al₂IrO₁₄. In: Inorganic Chemistry, 2015, vol. 54, n° 9, p. 4371-4376. doi: 10.1021/acs.inorgchem.5b00157 https://archive-ouverte.unige.ch/unige:82337