Magnetochemistry最新文献

Magnetic Substrates for Tissue Engineering—A Review 用于组织工程的磁性基底--综述

IF 2.6 4区化学

Magnetochemistry Pub Date : 2024-07-24 DOI: 10.3390/magnetochemistry10080052

T. Błachowicz, Andrea Ehrmann

引用次数: 0

Band Structure Calculations, Magnetic Properties and Magnetocaloric Effect of GdCo1.8M0.2 Compounds with M = Fe, Mn, Cu, Al 含 M = Fe、Mn、Cu、Al 的 GdCo1.8M0.2 化合物的带状结构计算、磁性能和磁ocaloric 效应

IF 2.6 4区化学

Magnetochemistry Pub Date : 2024-07-24 DOI: 10.3390/magnetochemistry10080053

G. Souca, R. Dudric, Karsten Küpper, C. Tiușan, R. Tetean

{"title":"Band Structure Calculations, Magnetic Properties and Magnetocaloric Effect of GdCo1.8M0.2 Compounds with M = Fe, Mn, Cu, Al","authors":"G. Souca, R. Dudric, Karsten Küpper, C. Tiușan, R. Tetean","doi":"10.3390/magnetochemistry10080053","DOIUrl":"https://doi.org/10.3390/magnetochemistry10080053","url":null,"abstract":"The magnetic properties, band structure results, and magnetocaloric effect of GdCo1.8M0.2 with M = Fe, Mn, Cu, and Al are reported. The band structure calculations demonstrate that all the samples have a ferrimagnetically ordered ground state, in perfect agreement with the magnetic measurements. Calculated magnetic moments and variation with the alloy composition are strongly influenced by hybridisation mechanisms as sustained by an analysis of the orbital projected local density of states. The XPS measurements reveal no significant shift in the binding energy of the investigated Co core levels with a change in the dopant element. The Co 3s core-level spectra gave us direct evidence of the local magnetic moments on Co sites and an average magnetic moment of 1.3 µB /atom was found, being in good agreement with the theoretical estimation and magnetic measurements. From the Mn 3s core-level spectra, a value of 2.1 µB/Mn was obtained. The symmetric shapes of magnetic entropy changes, the Arrott plots, and the temperature dependence of Landau coefficients clearly indicate a second-order phase transition. The relative cooling power, RCP(S), normalized relative cooling power, RCP(∆S)/∆B, and temperature-averaged entropy change values indicate that these compounds could be promising candidates for applications in magnetic refrigeration devices.","PeriodicalId":18194,"journal":{"name":"Magnetochemistry","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141806662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of the Different Molecular Weights of Polyethylene Glycol (PEG) Coating Agents on the Magnetic Targeting Characteristics of Functionalized Magnetoresponsive Nanoclusters 不同分子量的聚乙二醇 (PEG) 涂层助剂对功能化磁致伸缩纳米团簇磁性靶向特性的影响

IF 2.6 4区化学

Magnetochemistry Pub Date : 2024-07-19 DOI: 10.3390/magnetochemistry10070051

S. Bernad, Alexander Bunge, M. Ioncica, R. Turcu, Monica Dan, V. Socoliuc, D. Susan-Resiga, E. Bernad

{"title":"Impact of the Different Molecular Weights of Polyethylene Glycol (PEG) Coating Agents on the Magnetic Targeting Characteristics of Functionalized Magnetoresponsive Nanoclusters","authors":"S. Bernad, Alexander Bunge, M. Ioncica, R. Turcu, Monica Dan, V. Socoliuc, D. Susan-Resiga, E. Bernad","doi":"10.3390/magnetochemistry10070051","DOIUrl":"https://doi.org/10.3390/magnetochemistry10070051","url":null,"abstract":"In this article, we investigated the influence of molecular weight (Mw) on particle deposition efficiency after PEG-functionalized (polyethylene glycol-PEG) magnetoresponsive magnetic cluster targeting. In this work, the clusters were obtained by the solvothermal polyol method using polyethylene glycol (PEG) as a coating agent. So, we investigated three kinds of magnetoresponsive clusters: MNC-2000, MNC-6000, and MNC-10,000. These clusters were coated with PEG, and had molecular weights (Mw) of 2000 Da, 6000 Da, and 10,000 Da, respectively. The authors propose that the key to achieving maximum efficiency in targeted drug delivery is to deposit a thin, uniform layer of medication that covers the vascular wall in the area of interest. We defined a set of efficiency criteria to focus on the most essential characteristics of the targeting results. These are the obstruction degree, which measures the level of vessel obstruction; the magnet coverage degree, which evaluates the quality of particle deposition along the vessel wall; and the proximal deposition degree, which assesses the effect of pulsatile flow on deposition length. We performed several tests to determine how molecular weight affected these efficiency parameters. These tests examined (a) the effect of the injected cluster quantities, (b) the effect of the magnet distance, and (c) the effect of the injection period. Our findings indicate that an increase in PEG’s molar weight significantly impacts magnetic particle targeting efficiency.","PeriodicalId":18194,"journal":{"name":"Magnetochemistry","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141821505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnon Excitation Modes in Ferromagnetic and Antiferromagnetic Systems 铁磁和反铁磁系统中的磁子激发模式

IF 2.6 4区化学

Magnetochemistry Pub Date : 2024-07-14 DOI: 10.3390/magnetochemistry10070050

Xing Chen, Cuixiu Zheng, Yaowen Liu

引用次数: 0

Synergistic Effect of Magnetic Iron Oxide Nanoparticles with Medicinal Plant Extracts against Resistant Bacterial Strains 磁性纳米氧化铁颗粒与药用植物提取物对抗性细菌菌株的协同效应

IF 2.6 4区化学

Magnetochemistry Pub Date : 2024-07-12 DOI: 10.3390/magnetochemistry10070049

S. Bataineh, I. Arafa, Samya M. Abu-Zreg, Mohammad M. Al-Gharaibeh, H. Hammouri, Yaser H. Tarazi, H. Darmani

{"title":"Synergistic Effect of Magnetic Iron Oxide Nanoparticles with Medicinal Plant Extracts against Resistant Bacterial Strains","authors":"S. Bataineh, I. Arafa, Samya M. Abu-Zreg, Mohammad M. Al-Gharaibeh, H. Hammouri, Yaser H. Tarazi, H. Darmani","doi":"10.3390/magnetochemistry10070049","DOIUrl":"https://doi.org/10.3390/magnetochemistry10070049","url":null,"abstract":"Nanoparticles are emerging as a fascinating alternative to antibiotics. When stabilized by chemical compounds, magnetite nanoparticles (MagNPs) consistently exhibit bactericidal effects across different types of bacteria. This study describes the synthesis, characterization, and antibacterial properties of magnetite MagNPs prepared by the coprecipitation method under continuous sonication. Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), and Dynamic Light Scattering (DLS) techniques revealed Fe3O4-NPs as spherical, uniform particles with an average size of approximately 16 nm. The antibacterial efficacy of MagNPs was investigated by combining them with methanolic extracts of three medicinal plants known for their antibacterial properties: Aloysia triphylla, Sarcopoterium spinosum, and Urtica pilulifera. The combined effect was assessed against both wild type and resistant strains of Staphylococcus aureus and Escherichia coli. The antibacterial synergistic effect of MagNPs and plant extracts was evaluated by the MIC test, which showed significant inhibitory properties against the growth of the four bacterial strains as compared to control samples of plant extracts alone. Furthermore, the synergistic effect of MagNPs combined with extracts from Rosmarinus officinalis, Anchusa azurea, Quercus infectoria, and Urtica pilulifera significantly prevented biofilm development in both sensitive and resistant strains of Staphylococcus aureus.","PeriodicalId":18194,"journal":{"name":"Magnetochemistry","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141654760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural, Morphological and Ferroelectric Properties of Sr-Cd Co-Doped Nickel Ferrite for Energy Storage Devices 用于储能设备的硒镉共掺杂镍铁氧体的结构、形态和铁电特性

IF 2.6 4区化学

Magnetochemistry Pub Date : 2024-07-02 DOI: 10.3390/magnetochemistry10070048

H. A. Alburaih, Muhammad Ahsan ul Haq, Abdul Jabbar, Atiq ur Rehman, A. Laref, Mohamed Musa Saad Hasb Elkhalig, N. A. Noor

{"title":"Structural, Morphological and Ferroelectric Properties of Sr-Cd Co-Doped Nickel Ferrite for Energy Storage Devices","authors":"H. A. Alburaih, Muhammad Ahsan ul Haq, Abdul Jabbar, Atiq ur Rehman, A. Laref, Mohamed Musa Saad Hasb Elkhalig, N. A. Noor","doi":"10.3390/magnetochemistry10070048","DOIUrl":"https://doi.org/10.3390/magnetochemistry10070048","url":null,"abstract":"Ferroelectric materials, renowned for their capacity to demonstrate spontaneous electric polarization reversible through an external electric field, are essential in numerous technological applications owing to their distinctive characteristics. For this, a series of spinel Sr-Cd co-doped nickel ferrite nanomaterials Cd0.5−xSrxNi0.5Fe2O4 (x = 0.0, 0.1, 0.2 and 0.3) were prepared through the standard sol-gel auto combustion method The XRD patterns showed that the prepared samples have a cubic spinel structure. The crystallite sizes of the samples vary from 29 to 40 nm. The morphology of prepared samples showed uniformly distributed spheres. Magnetic properties showed the soft magnetic nature of the prepared ferrites. The ferroelectric study revealed that Sr-Cd substituted ferrites exhibited the elliptical nature of ferroelectric loops at normal room temperature. The maximum polarization has been achieved at x = 0.3. The understanding of current and voltage (I–V) showed a slowly decreasing tendency of leakage current on both sides symmetrically against the increasing Sr content. The conductivity of the prepared spinel increases as a function of higher Sr doping. The real part of dielectric constant increases with increasing frequency. The materials show large elliptical loops indicating high asymmetric ferroelectric energy storage capability.","PeriodicalId":18194,"journal":{"name":"Magnetochemistry","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141687373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of the Core–Shell Exchange Coupling on the Approach to Magnetic Saturation in a Ferrimagnetic Nanoparticle 核壳交换耦合对铁磁性纳米粒子接近磁饱和的影响

IF 2.6 4区化学

Magnetochemistry Pub Date : 2024-07-01 DOI: 10.3390/magnetochemistry10070047

Sergey V. Komogortsev, S. Stolyar, Alexey A. Mokhov, V. A. Fel’k, D. Velikanov, R. Iskhakov

引用次数: 0

Bipolar Nb3Cl8 Field Effect Transistors 双极 Nb3Cl8 场效应晶体管

IF 2.7 4区化学

Magnetochemistry Pub Date : 2024-06-14 DOI: 10.3390/magnetochemistry10060043

Yixiang Lu, Kai Zhao, Tongyao Zhang, Baojuan Dong

引用次数: 0

Nonequivalent Antiferromagnetically Coupled Sublattices Induce Two-Step Spin-Crossover Transitions: Equilibrium and Nonequilibrium Aspects 非等效反铁磁耦合子晶格诱发两步自旋交叉转换：平衡与非平衡方面

IF 2.7 4区化学

Magnetochemistry Pub Date : 2024-06-04 DOI: 10.3390/magnetochemistry10060042

V. Veliu, O. Yalçın, S. Özüm, R. Erdem

{"title":"Nonequivalent Antiferromagnetically Coupled Sublattices Induce Two-Step Spin-Crossover Transitions: Equilibrium and Nonequilibrium Aspects","authors":"V. Veliu, O. Yalçın, S. Özüm, R. Erdem","doi":"10.3390/magnetochemistry10060042","DOIUrl":"https://doi.org/10.3390/magnetochemistry10060042","url":null,"abstract":"As a continuation to the previously published work (Yalçın et al. (2022)), we investigate the equilibrium and nonequilibrium properties of the spin-crossover systems, with a specific focus on the nonequivalent sublattice, and compare these properties with those of the equivalent sublattices. We used the lowest approximation of the cluster variation method (LACVM) to derive the static equations for the order parameters of the two sublattices and determine high-spin fraction in relation to temperature and external magnetic field in a spin-crossover system. At a low temperature, the transition from stable high-spin (HS) state where nHS=1 occurs in the plateau region, where nHS=0.5 for nonequivalent sublattices. The order parameters for non-equivalent sublattices exhibit different states at the transition temperature. Also, we study the nonequilibrium properties of the order parameters and high-spin fraction using the path probability method (PPM). With the current model, we obtain and analyze the relaxation curves for the order parameters Sa, Sb, and high-spin fraction. These curves demonstrate the existence of bistability at low temperatures. At the end of this study, we present the flow diagram that shows the order parameters for different temperature values. The diagram exhibits states that are stable, metastable, and unstable.","PeriodicalId":18194,"journal":{"name":"Magnetochemistry","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141265800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Electric Properties of the Magnetopause Boundary Layer 磁极顶边界层的电特性

IF 2.7 4区化学

Magnetochemistry Pub Date : 2024-05-21 DOI: 10.3390/magnetochemistry10060037

Lai Gao, Chao Shen, Y. Ji, Yufei Zhou, Yulia V. Bogdanova

引用次数: 0