TY - JOUR

T1 - Dopant-activated magnetism and local structure properties of cubic shape Co, Mn:In2O3

AU - Manikandan, Dhamodaran

AU - Rahul, Kumar Yadav

AU - Karuppannan, Ramesh

AU - Murugan, Ramaswamy

AU - Boukhvalov, Danil W.

AU - Ashok, Kumar Yadav

AU - Rajeev, Gupta

N1 - The authors acknowledge Advanced Imaging Centre, Indian Institute of Technology, Kanpur, India for HRTEM and HAADF-STEM analysis, Pondicherry University, Puducherry, India for Raman and PPMS measurements, Sophisticated Analytical Instrument Facility (SAIF), Indian Institute of Technology, Chennai, India for VSM analysis, Centre for Nano Science and Engineering (CeNSE), Indian Institute of Science (IISc), Bengaluru, India for UV–Visible optical absorption spectroscopy measurements. Also, the authors acknowledge Raja Ramanna Centre for Advanced Technology (RRCAT), Indore, India for XAS measurements at the energy-scanning EXAFS beamline (BL-9). DWB acknowledges the support from the Ministry of Science and Higher Education of the Russian Federation (Project No. FEUZ-2023-0013 and Ural Federal University Program of Development within the Priority-2030 Program). MD acknowledges the Indian Institute of Technology, Kanpur, India for an Institute Postdoctoral Fellowship. Текст о финансировании #2 The authors acknowledge Advanced Imaging Centre, Indian Institute of Technology, Kanpur, India for HRTEM and HAADF-STEM analysis, Pondicherry University, Puducherry, India for Raman and PPMS measurements, Sophisticated Analytical Instrument Facility (SAIF), Indian Institute of Technology, Chennai, India for VSM analysis, Centre for Nano Science and Engineering (CeNSE), Indian Institute of Science (IISc), Bengaluru, India for UV–Visible optical absorption spectroscopy measurements. Also, the authors acknowledge Raja Ramanna Centre for Advanced Technology (RRCAT), Indore, India for XAS measurements at the energy-scanning EXAFS beamline (BL-9). DWB acknowledges the support from the Ministry of Science and Higher Education of the Russian Federation (Project No. FEUZ-2023-0013 and Ural Federal University Program of Development within the Priority-2030 Program ). MD acknowledges the Indian Institute of Technology, Kanpur, India for an Institute Postdoctoral Fellowship.

PY - 2023

Y1 - 2023

N2 - We present a systematic investigation of the impact of co-doping Co and Mn on the morphology, structure, local structure, and magnetism of In2O3 via experimental methods and density functional theory (DFT) to divulge the magnetic generation mechanism leading to the realized ferromagnetism at 300 K. Single-phase Co, Mn:In2O3 with the cubic shape of regular size with control on dopant concentration and shape were synthesized by hydrothermal-annealing scheme. The high-resolution transmission electron microscope (HRTEM) results demonstrated the cubic morphology with regular size and average edge length of 26–36 nm. X-ray absorption near edge structure (XANES) and DFT flourished the valence state of Co and Mn predominantly as 2+ and 3+ within the host lattice. Magnetic measurements of In1.96Co0.02Mn0.02O3, In1.94Co0.02Mn0.04O3, and In1.92Co0.02Mn0.06O3 samples exhibited room temperature ferromagnetism (RTFM) with higher saturation magnetization. DFT investigations corroborated that the observed changes in magnetic ordering and decrease in the magnetic moment at higher Mn doping were associated with the turn from the ferrimagnetic system of single impurities with large magnetic moments to the ferromagnetic system of ferrimagnetic clusters with smaller total magnetic moments. These findings provide deep insight into the fundamental understanding of the dopant-activated magnetism and local structure of In2O3-based nanostructures. © 2023 Elsevier Ltd.

AB - We present a systematic investigation of the impact of co-doping Co and Mn on the morphology, structure, local structure, and magnetism of In2O3 via experimental methods and density functional theory (DFT) to divulge the magnetic generation mechanism leading to the realized ferromagnetism at 300 K. Single-phase Co, Mn:In2O3 with the cubic shape of regular size with control on dopant concentration and shape were synthesized by hydrothermal-annealing scheme. The high-resolution transmission electron microscope (HRTEM) results demonstrated the cubic morphology with regular size and average edge length of 26–36 nm. X-ray absorption near edge structure (XANES) and DFT flourished the valence state of Co and Mn predominantly as 2+ and 3+ within the host lattice. Magnetic measurements of In1.96Co0.02Mn0.02O3, In1.94Co0.02Mn0.04O3, and In1.92Co0.02Mn0.06O3 samples exhibited room temperature ferromagnetism (RTFM) with higher saturation magnetization. DFT investigations corroborated that the observed changes in magnetic ordering and decrease in the magnetic moment at higher Mn doping were associated with the turn from the ferrimagnetic system of single impurities with large magnetic moments to the ferromagnetic system of ferrimagnetic clusters with smaller total magnetic moments. These findings provide deep insight into the fundamental understanding of the dopant-activated magnetism and local structure of In2O3-based nanostructures. © 2023 Elsevier Ltd.

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U2 - 10.1016/j.mssp.2023.107818

DO - 10.1016/j.mssp.2023.107818

M3 - Article

VL - 168

JO - Materials Science in Semiconductor Processing

JF - Materials Science in Semiconductor Processing

SN - 1369-8001

M1 - 107818

ER -