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Ahmad M, Rasool A, Abdul M, Rahman AU, Ullah Khan M, Murshed MN, El Sayed ME, Ahmad MA, Jingfu B. Intrinsic Room-Temperature Ferromagnetism in New Halide Perovskite AgCrX 3 (X: F, Cl, Br, I) Using Ab Initio and Monte Carlo Simulations. ACS OMEGA 2024; 9:18148-18159. [PMID: 38680354 PMCID: PMC11044162 DOI: 10.1021/acsomega.3c10174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 03/14/2024] [Accepted: 03/25/2024] [Indexed: 05/01/2024]
Abstract
Herein, we present a detailed comparative study of the structural, elastic, electronic, and magnetic properties of a series of new halide perovskite AgCrX3 (X: F, Cl, Br, I) crystal structures using density functional theory, mean-field theory (MFT), and quantum Monte Carlo (MC) simulations. As demonstrated by the negative formation energy and Born-Huang stability criteria, the suggested perovskite compounds show potential stability in the cubic crystal structure. The materials are ductile because the Pugh's ratio is greater than 1.75, and the Cauchy pressure (C12-C44) is positive. The ground state magnetic moments of the compound were calculated as 3.70, 3.91, 3.92, and 3.91 μB for AgCrF3, AgCrCl3, AgCrBr3, and AgCrI3, respectively. The GGA + SOC computed spin-polarized electronic structures reveal ferromagnetism and confirm the metallic character in all of these compounds under consideration. These characteristics are robust under a ±3% strained lattice constant. Using relativistic pseudopotentials, the total energy is calculated, which yields that the single ion anisotropy is 0.004 meV and the z-axis is the hard-axis in the series of AgCrX3 (X: F, Cl, Br, and I) compounds. Further, to explore room-temperature intrinsic ferromagnetism, we considered ferromagnetic and antiferromagnetic interactions of the magnetic ions in the compounds by considering a supercell with 2 × 2 × 2 dimensions. The transition temperature is estimated by two models, namely, MFT and MC simulations. The calculated Curie temperatures using MC simulations are 518.35, 624.30, 517.94, and 497.28 K, with ±5% error for AgCrF3, AgCrCl3, AgCrBr3, and AgCrI3 compounds, respectively. Our results suggest that halide perovskite AgCrX3 compounds are promising materials for spintronic nanodevices at room temperature and provide new recommendations. For the first time, we report results for novel halide perovskite compounds based on Ag and Cr atoms.
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Affiliation(s)
- Muhammad Ahmad
- School
of Integrated Circuit Science and Engineering, University of Electronic Sciences and Technology of China, Chengdu 610054, People’s Republic of China
- Department
of Physics, Comsats University Islamabad, Lahore Campus, Lahore 54000, Pakistan
| | - Akhtar Rasool
- Department
of Physics, University of Sargodha, Sargodha 40100, Panjab
| | - Muhammad Abdul
- School
of Integrated Circuit Science and Engineering, University of Electronic Sciences and Technology of China, Chengdu 610054, People’s Republic of China
| | - Altaf Ur Rahman
- Department
of Physics, Riphah International University, Lahore 54000, Pakistan
| | - Misbah Ullah Khan
- Department
of Physics, Comsats University Islamabad, Lahore Campus, Lahore 54000, Pakistan
| | - Mohammad N. Murshed
- Physics
Department Faculty of Science and Arts, King Khalid University, Muhayl Asser, Abha 61421, Saudi Arabia
| | - Mohamed E. El Sayed
- Physics
Department Faculty of Science and Arts, King Khalid University, Muhayl Asser, Abha 61421, Saudi Arabia
| | | | - Bao Jingfu
- School
of Integrated Circuit Science and Engineering, University of Electronic Sciences and Technology of China, Chengdu 610054, People’s Republic of China
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The Lotsberg Salt Formation in Central Alberta (Canada)—Petrology, Geochemistry, and Fluid Inclusions. MINERALS 2020. [DOI: 10.3390/min10100868] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The Lotsberg Salt Formation (LSF) of the Lower Devonian age occupies a large area in Alberta (Canada). It has been used for brine production, disposal, and storage purposes since the 1950s. Its petrological and geochemical features remain poorly understood up to now. Previous studies showed that these salt rocks are large crystalline and distinguishable by a very low bromine content (2–5 ppm). Our studies reveal that the main impurity is dolomite with an addition of haematite. It showed, also, a lack of sulphate minerals (anhydrite). Manganite also occurs within the halite crystals. Microthermometric measurements of primary fluid inclusions in halite show a large range of homogenization temperatures from 32.4 °C to 357.0 °C with the highest temperature in the upper part of the salt profile. Geochemical analysis confirms the low bromine contents, which is between 0.67–12.74 ppm. Potassium contents (166–3651 ppm) seem to be in the normal range for salt rocks, but magnesium content (25–177 ppm) is much lower than potassium. Rubidium is, as well, within the normal range, with values between <0.01 ppm and 3.13 ppm, while caesium contents (5.07–211.22 ppm) are almost sixty times higher in comparison to those of rubidium. The high concentration of Cs, Mn, Rb, and the high homogenization temperatures of the host minerals suggest that the LSF underwent extensive ion exchange related to hydrothermal inflow. These hydrothermal solutions originated from the basement of the LSF.
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Gutenberg B. Die Geschwindigkeit der Erdbebenwellen und die elastischen Konstanten in den obersten Erdschichten. Naturwissenschaften 1925. [DOI: 10.1007/bf01559126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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