M/Li+(M= Mg2+, Zn2+, and Mn2+) ion-exchange on lithium ion-conducting perovskite-type oxides and their properties

Inaguma, Yoshiyuki; Wataru, Mashiko; Watanabe, Masato; Atsumi, Yuri; Okuyama, Nozomi; Katsumata, Tetsuhiro; Ohba, Tomonori

doi:10.1016/j.ssi.2006.02.034

Cited by 7 publications

(3 citation statements)

References 25 publications

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“…Our maximum temperature of 400 K was not enough for reliable Curie-Weiss fits. Previous measurements 19 up to 800 K yielded the Curie-Weiss constants ΘCW = -400 K for Ba2CuTeO6 and ΘCW = -249 K for Ba2CuWO6 revealing strong antiferromagnetic interactions.…”

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confidence: 94%

“…This is due to the smaller tilting of the CuO6 octahedra in the barium phases, which leads to stronger orbital overlap as the Cu-O-Te/W angle is closer to 180 degrees. 19 As long-range magnetic order is driven by the weak out-of-plane interactions which are of the same order in all compounds, Ba2CuTeO6 and Ba2CuWO6 are even closer to ideal two-dimensional antiferromagnets than their strontium analogues. The transition temperature of Ba2CuTeO6 is not known, but we predict it to have the highest frustration index f = ΘCW/TN of these compounds and the Néel magnetic structure due to the very strong J1 interaction.…”

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confidence: 97%

“…Ba2CuWO6 is known to have columnar magnetic order, 17,18 but little is known about Ba2CuTeO6 as the perovskite phase requires high pressures to synthesise. 19 Here we use density functional theory (DFT) calculations and hightemperature series expansion (HTSE) fitting of experimental susceptibility data to show that these compounds are FSL antiferromagnets with opposite dominant interactions similar to Sr2CuTeO6 and Sr2CuWO6. We predict a quantum-spin-liquid-like state in Ba2Cu(Te1-xWx)O6 with strong antiferromagnetic interactions.…”

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confidence: 99%

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Magnetic interactions in the S = 1/2 square-lattice antiferromagnets Ba₂CuTeO₆ and Ba₂CuWO₆: parent phases of a possible spin liquid

et al. 2019

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The isostructural double perovskites Ba2CuTeO6 and Ba2CuWO6 are shown by theory and experiment to be frustrated squarelattice antiferromagnets with opposing dominant magnetic interactions. This is driven by differences in orbital hybridisation of Te 6+ and W 6+ . A spin-liquid-like ground state is predicted for Ba2Cu(Te1-xWx)O6 solid solution similar to recent observations in Sr2Cu(Te1-xWx)O6.Magnetic frustration can stabilise novel quantum ground states such as quantum spin liquids or valence bond solids. 1 Frustration occurs when not all of the magnetic interactions in a material can be satisfied simultaneously as a result of lattice geometry or competing interactions. We have recently shown that a quantumspin-liquid-like state forms in the double perovskite solid solution Sr2Cu(Te1-xWx)O6 with a square lattice of Cu 2+ (3d 9 , S = 1/2) cations. 2,3 This was the first observation of a spin-liquid-like state in a square-lattice compound after 30 years of theoretical predictions. [4][5][6][7] The parent compounds Sr2CuTeO6 and Sr2CuWO6 are frustrated square-lattice (FSL) antiferromagnets. [8][9][10][11][12] The FSL model ( Fig. 1) has two interactions: nearest-neighbour J1 interaction (side) and next-nearest-neighbour J2 interaction (diagonal). Dominant antiferromagnetic J1 leads to Néel type antiferromagnetic order and dominant J2 leads to columnar magnetic order. Magnetic frustration arises from the competition of J1 and J2, and a quantum spin liquid state has been predicted for J2/J1 = 0.5 where frustration is maximised. [4][5][6][7] Sr2CuTeO6 and Sr2CuWO6 are the first known isostructural FSL systems with different dominant interactions and magnetic structures: dominant J1 and Néel order for Sr2CuTeO6 and dominant J2 and columnar order for Sr2CuWO6 respectively. 8,9 The two compounds have a tetragonal I4/m double perovskite structure with nearly identical bond distances and angles. 10,12 The magnetism becomes highly two-dimensional as a result of a Jahn-Teller distortion as the only unoccupied Cu orbital 3 2 − 2 is in the ab square plane. The major differences in dominant magnetic interactions are due to the diamagnetic Te 6+ d 10 and W 6+ d 0 cations located in the middle of the Cu 2+ square (Fig. 1c), which hybridise differently with O 2p allowing different superexchange paths between the Cu 2+ cations. 13,14 The spinliquid-like ground state forms when these two perovskites are mixed into a Sr2Cu(Te1-xWx)O6 solid solution. 2,3,15 Muon spin relaxation experiments revealed the absence of magnetic order or static magnetism in a wide composition range of x = 0.1-0.6. 2,3 The specific heat displays T-linear behaviour suggesting gapless excitations in a similar composition range. 2,3,15 The ground state has been proposed to be a random-singlet state with a disordered arrangement of non-magnetic valence bond singlets. 16 Motivated by these exciting findings in the Sr2Cu(Te1-xWx)O6 system, we have investigated the magnetic interactions of the isostructural barium analogues Ba2CuTeO6 and Ba2CuWO6. Ba2CuWO6 is know...

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Magnetic interactions in the S = 1/2 square-lattice antiferromagnets Ba₂CuTeO₆ and Ba₂CuWO₆: parent phases of a possible spin liquid

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Preparation, characterization and luminescent properties of europium oxide doped nano LaMn0·9Zn0·1O3+d by sol-gel processing

2008

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New compounds of rare earth complex oxides with perovskite structure in a combination of La with Eu ions and Mn with Zn ions, La 1-x Eu x Mn 0⋅9 Zn 0⋅1 O 3+d (LEMZ) (0⋅0 ≤ x ≤ 0⋅32) in A and B sites, respectively were synthesized. X-ray powder diffraction (XRD), fourier transform infrared spectroscopy (FT-IR) and photoluminescence spectra (PL) were used to characterize the resulting nanoparticles. The powder X-ray diffraction peaks could be indexed as a rhombohedral cell. The results of FT-IR spectra were in agreement with those of XRD. High-quality nanopowders with controlled stoichiometry and microstructure were prepared at a temperature range of 700-800°C for 6 h, with mean particle sizes of ~ 17⋅5 nm. Photoluminescence measurements showed Eu 3+ ions characteristic red emission in crystalline LEMZ powders due to the 5 D 0 → 7 F J (J = 0-6) transitions of the 4f electrons of Eu 3+ ions. The structure, homogeneity and particle size of the obtained compounds during different stages were investigated by scanning electron microscopy (SEM).

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γ-radiation-induced centers in irradiated perovskite SrCeO3 and their role in thermally stimulated reactions: Fluorescence, thermally stimulated luminescence, electron paramagnetic resonance and shielding studies

Singh,

Watanabe,

Rao

et al. 2024

Ceramics International

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M/Li+(M= Mg2+, Zn2+, and Mn2+) ion-exchange on lithium ion-conducting perovskite-type oxides and their properties

Cited by 7 publications

References 25 publications

Magnetic interactions in the S = 1/2 square-lattice antiferromagnets Ba₂CuTeO₆ and Ba₂CuWO₆: parent phases of a possible spin liquid

Magnetic interactions in the S = 1/2 square-lattice antiferromagnets Ba₂CuTeO₆ and Ba₂CuWO₆: parent phases of a possible spin liquid

Preparation, characterization and luminescent properties of europium oxide doped nano LaMn0·9Zn0·1O3+d by sol-gel processing

γ-radiation-induced centers in irradiated perovskite SrCeO3 and their role in thermally stimulated reactions: Fluorescence, thermally stimulated luminescence, electron paramagnetic resonance and shielding studies

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M/Li+(M= Mg2+, Zn2+, and Mn2+) ion-exchange on lithium ion-conducting perovskite-type oxides and their properties

Cited by 7 publications

References 25 publications

Magnetic interactions in the S = 1/2 square-lattice antiferromagnets Ba2CuTeO6 and Ba2CuWO6: parent phases of a possible spin liquid

Magnetic interactions in the S = 1/2 square-lattice antiferromagnets Ba2CuTeO6 and Ba2CuWO6: parent phases of a possible spin liquid

Preparation, characterization and luminescent properties of europium oxide doped nano LaMn0·9Zn0·1O3+d by sol-gel processing

γ-radiation-induced centers in irradiated perovskite SrCeO3 and their role in thermally stimulated reactions: Fluorescence, thermally stimulated luminescence, electron paramagnetic resonance and shielding studies

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Magnetic interactions in the S = 1/2 square-lattice antiferromagnets Ba₂CuTeO₆ and Ba₂CuWO₆: parent phases of a possible spin liquid

Magnetic interactions in the S = 1/2 square-lattice antiferromagnets Ba₂CuTeO₆ and Ba₂CuWO₆: parent phases of a possible spin liquid