Article
Environmental Sciences
Ting Lu, Wensong Wang, Zuoan Wei, Yonghao Yang, Guansen Cao
Summary: The study found that phosphogypsum exhibits medium compressibility and medium to weak permeability characteristics. Shear strength and deformation modulus significantly increased with increasing dry density and consolidation confining pressure. Liquefaction resistance curves were expressed by power functions, shifting higher and becoming steeper with increasing dry density. The Davidenkov model was found to be more suitable for describing the relationship between the dynamic shear modulus ratio and damping ratio of PG compared to the Hardin-Drnevich model.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Yikai Wang, Chun Hu, Zhongxiang Li, Dezhi Zheng, Fei Cui, Xiaojun Yang
Summary: This paper investigates the static and dynamic characteristics of the MXene-based IDE capacitive humidity sensor through theoretical modeling and simulation. It finds that the thickness of the sensing film affects the capacitance and response time, and there is a threshold thickness beyond which the capacitance stops increasing. Additionally, temperature has an impact on the capacitance and response time. Subsequent studies confirm the accuracy of the model and provide methods for optimizing sensor performance.
APPLIED SCIENCES-BASEL
(2022)
Article
Materials Science, Multidisciplinary
Yu-Hong Lai, Pao -Wen Shao, Chang-Yang Kuo, Cheng-En Liu, Zhiwei Hu, Chen Luo, Kai Chen, Florin Radu, Yong-Jyun Wang, Junding Zheng, Chungang Duan, Chun-Fu Chang, Li Chang, Yi-Chun Chen, Sang-Wook Cheong, Ying-Hao Chu
Summary: This study investigates the modulation of magnetic and electric orders in magnetoelectric materials through quasi-static mechanical strain. It is found that mechanical bending can significantly enhance the magnetization of Cr2O3 film and adjust its electric polarization and magnetoelectric coupling. This work provides a comprehensive understanding of the relationship between strain and magnetic and electrical behaviors and opens new possibilities for combining magnetoelectric materials with flexible substrates.
Article
Physics, Applied
A. T. Apostolov, I. N. Apostolova, J. M. Wesselinowa
Summary: The multifunctional properties of ion-doped YFeO3 nanoparticles in hexagonal and orthorhombic structures were investigated theoretically. It was found that the magnetization of h-YFO nanoparticles increases with decreasing size, while for o-YFO nanoparticles it decreases. Both types of YFO nanoparticles exhibit a peak in the dielectric constant around T-C1 at approximately 450 K, with an additional anomaly appearing only in h-YFO at T-C2 around 300 K, potentially related to a phase transition. The polarization in doped o-YFO nanoparticles increases with a magnetic field, and doping with Ti4+ ions results in a shift in the magnetization curve. The transformation between the hexagonal and orthorhombic phases can be achieved by doping ions on Y or Fe sites in YFO.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Physics, Applied
Fatima Zahrae Kassimi, Halima Zaari, Abdelilah Benyoussef, Abdeljalil Rachadi, Abdallah El Kenz
Summary: Multiferroic oxide material YMnO3 exhibits magnetic, electrical, and magnetocaloric properties. The material shows antiferromagnetic behavior and behaves as a semiconductor. By calculation and simulation, important parameters for the magnetic and magnetocaloric properties of the material are obtained.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2022)
Article
Physics, Condensed Matter
M. A. Carpenter, D. Pesquera, D. O'Flynn, G. Balakrishnan, N. Mufti, A. A. Nugroho, T. T. M. Palstra, M. Mihalik, M. Mihalik, M. Zentkova, A. Almeida, J. Agostinho Moreira, R. Vilarinho, D. Meier
Summary: Resonant ultrasound spectroscopy has been used to characterize strain coupling and relaxation behavior associated with magnetic/magnetoelectric phase transitions in GdMnO3, TbMnO3 and TbMn0.98Fe0.02O3. The results show anomalies in dielectric and electrical properties, as well as freezing processes related to polaron mechanisms. The study confirms typical patterns for multiferroic orthorhombic RMnO3 perovskites, with strain effects being important in defining magnetoelectric properties.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Chemistry, Inorganic & Nuclear
Sunil Kumar, Selvakumar Arumugam, Bjoern Schwarz, Helmut Ehrenberg, Kartik Chandra Mondal
Summary: A representative Co(II) based single ion magnet (SIM) with N2O2 donor set and distorted pseudo-tetrahedral geometry has been synthesized and characterized. The atomic and electronic structure have been studied through DC magnetometry, ab-initio multi-reference CASSCF calculations, and qualitative ligand field theory. AC magnetometry has been used for the investigation of spin-lattice relaxation with temperature and magnetic field variations.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Francisco Olea de la Hoz, Eduardo Saavedra, Alejandro Pereira, Juan Escrig
Summary: In this study, we investigated the magnetic properties of Fe3O4 nanotubes with varying external radius and tube wall thickness. Through numerical analysis of hysteresis curves with external magnetic field applied along the tube axis, we found that nanotubes with an external radius of 30 nm exhibit non-monotonic coercivity behavior due to a change in magnetization reversal mechanism, which is not observed in nanotubes with an external radius of 80 nm. We also studied the dynamic susceptibility of these nanotubes and discovered that the position and number of resonance peaks can be controlled by manipulating the nanotube geometry. Overall, our findings provide valuable insights into the behavior of Fe3O4 nanotubes and their potential use in technological devices.
Article
Physics, Condensed Matter
I. N. Apostolova, A. T. Apostolov, J. M. Wesselinowa
Summary: This study investigated the magnetic and thermal properties of DyFeWO6 for the first time using a microscopic model and the Green's function technique. The results show that DyFeWO6 exhibits multiferroicity and its properties are influenced by the magnetic field.
EUROPEAN PHYSICAL JOURNAL B
(2022)
Article
Materials Science, Multidisciplinary
Fatima Zahrae Kassimi, Halima Zaari, Abdelilah Benyoussef, Abdeljalil Rachadi, Mohamed Balli, Abdallah El Kenz
Summary: This paper investigates the electronic, magnetic, and magnetocaloric properties of the multiferroic TbMnO3 manganite, proposing a physical model to describe the magnetic interaction within the material and utilizing density functional theory and Monte Carlo simulation for analysis. The study reveals that the highest isothermal entropy change for TbMnO3 is -17.8 J/kg·K at H = 8 T, with a maximum RCP value of 507.06 J/kg and an adiabatic temperature change reaching close to 22.5 K.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Youness Kaddar, Halima Zaari, Abdeljalil Rachadi, Abdelilah Benyoussef, Abdallah El Kenz, Mohamed Balli
Summary: DyMn2O5, with its multiferroic properties and large magnetic entropy change, is a promising candidate for magnetic cooling at low temperatures.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Vladimir Frid, Stelios M. Potirakis, Semen Shulov
Summary: This study investigated the behavior of sand with different grain sizes during compression through the combined study of ultrasound wave speed and acoustic emission. The results show that higher soil stiffness is associated with higher P wave speed values and more AE events, with the number of AE hits and signal energy being the most sensitive parameters to stress increase.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Physical
Dibyajyoti Mohanta
Summary: In this study, we investigated the melting process of dsDNA under varying confinement and found structural transitions and the emergence of local denatured zones. By using enumeration and Fokker-Planck formalism, we determined the survival time of single bubbles and the effect of DNA sequences on the melting process.
Article
Polymer Science
Houqi Yao, Yuezhao Pang, Xin Liu, Jia Qu
Summary: The compressive responses of PVC foams with different densities were investigated under both quasi-static and high strain rate conditions. The results show that the mechanical properties of the foam materials are related to their density and are strain rate-sensitive.
Article
Construction & Building Technology
Lei Xie, Xinjian Sun, Zhenpeng Yu, Zhixuan Guan, Anxiong Long, Huiheng Lian, Yaojie Lian
Summary: An experimental study was conducted to investigate the dynamic mechanical properties of basalt fiber reinforced concrete (BFRC) under different strain rates, fiber contents, and fiber lengths. The results showed that increasing strain rates significantly enhanced the compressive failure extent, compressive strength, and dynamic increase factor of BFRC. Under constant strain rates, the compressive strength, dynamic increase factor, and deformability of BFRC initially increased and then decreased with increasing fiber content or fiber length. The study provided valuable insights into the impact performance of BFRC and offered a basis for the design and analysis of BFRC structures under dynamic loads.
JOURNAL OF BUILDING ENGINEERING
(2022)
