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Stacking Faults and Short‐Range Magnetic Correlations in Single Crystal Y 5 Ru 2 O 12 : A Structure with Ru +4.5 One‐Dimensional Chains
Author(s) -
Sanjeewa Liurukara D.,
Liu Yaohua,
Xing Jie,
Fishman Randy S.,
Kolambage Mudithangani T. K.,
McGuire Michael A.,
McMillen Colin D.,
Kolis Joseph W.,
Sefat Athena S.
Publication year - 2021
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.202000197
Subject(s) - antiferromagnetism , crystallography , magnetization , crystal structure , magnetic moment , atmospheric temperature range , stacking , neutron diffraction , néel temperature , condensed matter physics , single crystal , ruthenium , octahedron , chemistry , materials science , physics , nuclear magnetic resonance , magnetic field , biochemistry , quantum mechanics , meteorology , catalysis
The synthesis, structure, and physical properties of Y 5 Ru 2 O 12 , a new member of the Ln 5 B 2 O 12 class (Ln = lanthanide, B = Ru, Re, Mo) are reported. Single crystals of Y 5 Ru 2 O 12 are synthesized using a high‐temperature, high‐pressure (700 °C, 200 MPa) hydrothermal method. The structure features edge‐sharing RuORu 1D chains of distorted RuO 6 octahedra. The YO n ( n = 6 and 7) polyhedral groups bridge RuORu chains across the unit cell by forming a complex 3D structure. The RuORu chains contain alternating shorter and longer RuRu distances along the chain. Single crystal neutron diffraction shows streak‐like diffuse scattering along the H ‐direction, due to stacking faults. Temperature‐dependent anisotropic magnetic measurements reveal a broad feature over a wide temperature range, with a maximum at ≈70 K indicating potential short‐range ordering, with canted antiferromagnetic behavior below 30 K. The dominant magnetic interactions are antiferromagnetic with a large negative Weiss temperature θ ≈ −200 K. The compound has an effective magnetic moment that is anomalously large for this class of compounds (≈4 μ B Ru −1 ), and a phenomenological spin Hamiltonian describing the unusual anisotropic magnetization of Y 5 Ru 2 O 12 is proposed.