Optical spectroscopy study of Ca3(Ru0.91Mn0.09)2O7 single crystal in high magnetic fields

Xu, Xueli; Jin, Peng; Zhang, Junpei; Ma, Zongwei; Chen, Cheng; Han, Junbo; Liu, Bingjie; Lin, Ling-Fang; Wu, Xiaoshan; Mao, Zhiqiang; Qu, Zhe; Sheng, Zhigao

doi:10.1016/j.scib.2018.11.013

Science Bulletin

2019

DOI: 10.1016/j.scib.2018.11.013

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Optical spectroscopy study of Ca3(Ru0.91Mn0.09)2O7 single crystal in high magnetic fields

Xueli Xu¹,

Peng Jin²,

Junpei Zhang³

et al.

Abstract: a b s t r a c tThe magneto-optical spectrum, with magnetic fields up to 42 T, of double layered ruthenates Ca 3 (Ru 0.91 Mn 0.09 ) 2 O 7 (CRMO) single crystal is studied. Both the temperature and magnetic field induced insulator-to-metal transitions (IMTs) are observed via magneto-optical properties of the crystal. The critical magnetic field (H // c) of IMT for CRMO is found to be as large as 35 T at 5 K. The fine structure of optical spectra identified the antiferromagnetic/ferro-orbital-ordering configurati… Show more

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Cited by 4 publications

References 36 publications

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3D Graphene‐Carbon Nanotube Hybrid Supported Coupled Co‐MnO Nanoparticles as Highly Efficient Bifunctional Electrocatalyst for Rechargeable Zn‐Air Batteries

Zhang

Kong

Qiao

et al. 2020

Chemistry An Asian Journal

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The development of high-efficiency and low-cost catalysts is one of the core and important issues to improve the efficiency of electrochemical reactions on electrodes, and it is also the goal we ultimately pursue in the commercialization of large-scale clean energy technologies, such as metalair batteries. Herein, a nitrogen-doped graphene oxide (GO)carbon nanotube (CNT) hybrid network supported coupled Co/MnO nanoparticles (Co/MnO@NÀ C) catalyst was prepared with a hydrothermal-pyrolysis method. The unique threedimensional network structure of substrate allowed for the uniform dispersion of CoÀ MnO nanoparticles in the carbon skeleton. These characters enable the Co/MnO@NÀ C to possess the excellent bifunctional electrocatalysts. In alkaline electrolyte, the Co/MnO@NÀ C presents the outstanding oxygen evolution reaction (OER) performance comparable to the commercial RuO 2 catalyst and the exceedingly good oxygen reduction reaction (ORR) activity with positive half-wave potential of 0.90 V vs. RHE outperforming commercial Pt/C (0.84 V vs. RHE) and the recently reported analogous electrocatalysts. When it is applied to homemade Zn-air batteries, such a non-noble metal electrocatalyst can deliver a better power density, specific capacity and cycling stability than mixed Pt/C and RuO 2 catalyst, and exhibits a wide application prospect and great practical value.

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3D Graphene‐Carbon Nanotube Hybrid Supported Coupled Co‐MnO Nanoparticles as Highly Efficient Bifunctional Electrocatalyst for Rechargeable Zn‐Air Batteries

Zhang

Kong

Qiao

et al. 2020

Chemistry An Asian Journal

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3D Carbon Electrode with Hierarchical Nanostructure Based on NiCoP Core‐Layered Double Hydroxide Shell for Supercapacitors and Hydrogen Evolution

et al. 2021

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Currently, the development of self-supported and low-cost earth-abundant electrocatalysts with well-defined nanostructure has shown significant potential in energy-related storage and electrocatalytic reactions. Herein, a three-dimensional (3D) selfsupporting electrode NiCoP@NiCo LDH/CC (NCP@NCH/CC) constructed with NCP@NCH core-shell nanostructures and carbon cloth as substrate has been developed via the hydrothermal and subsequent electrodeposition process. The obtained 3D electrode with 1D NiCoP nanowires (NWs) core and 2D NiCo LDH nanosheets shell can exhibit superior electrochemical performance and remarkable stability for the pseudocapacitive reaction and hydrogen evolution reaction (HER), even comparable to the best reported transition metal phosphides (TMP) electrodes. It reveals an ultra-high area specific capacitance (9.4 F/cm 2 at 10 mA/cm 2 in 3 M KOH electrolyte), outstanding capacitance retention (74.12 % from 10 to 60 mA/cm 2 ) and excellent cycling stability (93.51 % of original capacitance was retained after 5000 cycles at 50 mA/cm 2 ) as supercapacitor electrode material. For HER in alkaline media, it can demonstrate an overpotential of 182 mV at 10 mA/cm 2 and Tafel slope of 82 mV/dec in 1 M KOH. For HER in acidic electrolyte, it can exhibit an overpotential of 141 mV at 10 mA/ cm 2 and Tafel slope of 82 mV/dec in 0.5 M H 2 SO 4 . The electrochemical performance enhancement can be ascribed to the core-shell NiCoP@NiCo LDH nanostructure anchored on the carbon and synergistic effect with the carbon cloth in 3D electrode. Our present work provides a facile strategy to construct 3D TMP-based carbon electrode with core-shell nanostructures, demonstrating a great promise for storage processes and energy conversion.

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Doped spin–orbital Mott insulators: Orbital dilution versus spin–orbital polarons

Brzezicki

Avella

Cuoco

et al. 2022

Journal of Magnetism and Magnetic Materials

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Optical spectroscopy study of Ca3(Ru0.91Mn0.09)2O7 single crystal in high magnetic fields

Cited by 4 publications

References 36 publications

3D Graphene‐Carbon Nanotube Hybrid Supported Coupled Co‐MnO Nanoparticles as Highly Efficient Bifunctional Electrocatalyst for Rechargeable Zn‐Air Batteries

3D Graphene‐Carbon Nanotube Hybrid Supported Coupled Co‐MnO Nanoparticles as Highly Efficient Bifunctional Electrocatalyst for Rechargeable Zn‐Air Batteries

3D Carbon Electrode with Hierarchical Nanostructure Based on NiCoP Core‐Layered Double Hydroxide Shell for Supercapacitors and Hydrogen Evolution

Doped spin–orbital Mott insulators: Orbital dilution versus spin–orbital polarons

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