Possible quadrupole order in tetragonal Ba2CdReO6 and chemical trend in the ground states of 5d1 double perovskites

Abstract

The synthesis and physical properties of the double perovskite (DP) compound Ba2CdReO6 with the 5d1 electronic configuration are reported. Three successive phases originating from a spin-orbit-entangled Jeff = 3/2 state, confirmed by the reduced effective magnetic moment of 0.72 μB, were observed upon cooling. X-ray diffraction measurements revealed a structural transition from a high-temperature cubic structure to a low-temperature tetragonal structure at Ts = 170 K, below which the Jeff = 3/2 state was preserved. Magnetization, heat capacity, and thermal expansion measurements showed two more electronic transitions to a possible quadrupole ordered state at Tq = 25 K, and an antiferromagnetic order of dipoles accompanied by a ferromagnetic moment of ~ 0.2 μB at Tm = 12 K. These properties were compared with those of the sister compounds Ba2BReO6 (B = Mg, Zn, and Ca) and the chemical trend is discussed in terms of the mean-field theory for spin-orbit-coupled 5d electrons [G. Chen et al., Phys. Rev. B 82, 174440 (2010)]. The DP compound Ba2BReO6 provides a unique opportunity for a systematic investigation on symmetry breaking in the presence of multipolar degrees of freedom.

9 pages, 4 figures, 1 Table

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• Ferromagnetism in the Mott insulator Ba2NaOsO6
• Novel Magnetism and Local Symmetry Breaking in a Mott Insulator with Strong Spin Orbit Interactions
• Detection of multipolar orders in the spin-orbit-entangled 5d Mott insulator Ba2MgReO6
• Successive Symmetry Breaking in a Jeff = 3/2 Quartet in the Spin-Orbit Coupled Insulator Ba2MgReO6
• Effective magnetic interactions in spin-orbit coupled $d^4$ Mott insulators
• Magnetic Excitations in Spin-Orbit Coupled $d^4$ Mott Insulator on Square Lattice
• Magnetism in S=1/2 Double-Perovskites with Strong Spin-Orbit Interactions
• Direct experimental observation of the molecular Jeff=3/2 ground state in the lacunar spinel GaTa4Se8
• Covalency and vibronic couplings make a nonmagnetic j=3/2 ion magnetic
• "Visible" 5d orbital states in a pleochroic oxychloride
• Phase transition preceding magnetic long-range order in the double perovskite Ba2NaOsO6
• One-dimensionalization by Geometrical Frustration in the Anisotropic Triangular Lattice of the 5d Quantum Antiferromagnet Ca3ReO5Cl2
• Calculated g-factors of 5d double perovskites Ba2NaOsO6 and Ba2YOsO6
• Antiferromagnetic long-range order in $5d^1$ double-perovskite Sr${}_2$MgReO${}_6$

Cited by in corpus (11)

• Exchange interactions, Jahn-Teller coupling, and multipole orders in pseudospin one-half $5{\mathbf{d}}^2$ Mott insulators
• Untangling the structural, magnetic dipole, and charge multipolar orders in Ba${}_2$MgReO${}_6$
• Vibronic order and emergent magnetism in cubic $d^1$ double perovskites
• Valence bond glass state in the 4$d^1$ fcc antiferromagnet Ba${}_2$LuMoO${}_6$
• Interplay between quadrupolar and magnetic interactions in 5$d^1$ double perovskite Ba${}_2$MgReO${}_6$ under pressure
• Interplay of superexchange and vibronic effects in the hidden order of Ba${}_2$MgReO${}_6$ from first principles
• Pinalites: Optical properties and Quantum Magnetism of Heteroanionic A${}_3$MO${}_5$X${}_2$ Compounds
• Dynamic Jahn-Teller Phenomena in Heavy Transition Metal Compounds
• Experimental and theoretical thermodynamic studies in Ba${}_2$MgReO${}_6$ -- the ground state in the context of Jahn-Teller effect
• Chemical Pressure Tuning of Multipolar and Magnetic Orders in Ba${}_2$(Cd${}_{1-x}$Ca${}_x$)ReO${}_6$ Double Perovskites
• Dipolar and quadrupolar correlations in the $5d^2$ Re-based double perovskites Ba${}_2$YReO${}_6$ and Ba${}_2$ScReO${}_6$