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Impedance spectroscopy study on mn_(1+x)Fe_(2-2x)Ti_xO_4(0≤x≤0.5) ferrites

Journal of Central South University 2010年第6期17卷 1133-1138页

作者： kUmAR S batoo k m PRAkASH R CHOI H k kOO B H SONG J I CHUNG H JEONG H LEE C G School of Nano and Advanced materials Engineering Changwon National UniversityChangwon 641773Korea king Abdullah Institute for Nanotechnology King Saud UniversityRiyadh 11451Saudi Arabia Department of mechanical Engineering Changwon National UniversityChangwon 641773Korea Department of Precision & mechanical Engineering and Bk21 Eco-Friendly Heat & Cold Energy mechanical Research Team Gyeongsang National U niversityTongyeong 650160Korea

The complex impedance spectroscopy and surface morphology of mn1+xFe2-2xTixO4(0≤x≤0.5) system,prepared using a conventional solid state reaction technique,were *** impedance spectroscopy measurements were carried out at room temperature in the frequency range of 42-5 *** electrical processes in the samples were modeled in the form of an equivalent circuit made up of a combination of two parallel RC circuits attributed to grain and grain *** DC conductivity obtained by extrapolation of AC data using impedance spectroscopy and four-probe method increases at 10% doping of Ti *** energy-dispersive X-ray(EDX) pattern confirmed the homogeneous mixing of the mn,Fe,Ti and O atoms in pure and doped ferrite samples.

关键词： spinel ferrite magnetic properties impedance spectroscopy Ti4+ ions doping

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mssbauer spectra of mnFe_(2-2x)Al_(2x)O_4(0≤x≤0.4) ferrites

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Journal of Central South University 2010年第6期17卷 1129-1132页

作者： batoo k m kUmAR S PRAkASH R ALImUDDIN SONG J I CHUNG H JEONG H kOO B H LEE C G king Abdullah Institute for Nanotechnology King Saud UniversityRiyadh 11451Saudi Arabia School of Nano and Advanced materials Engineering Changwon National UniversityChangwon 641773Korea Department of mechanical Engineering Changwon National UniversityChangwon 641773Korea Department of Applied Physics Aligarh Muslim UniversityAligarh 202002India Department of Precision & mechanical Engineering and Bk21 Eco-Friendly Heat & Cooling Energy mechanical Research Team Gyeongsang National U niversityTongyeong 650160Korea

The effect of non-magnetic Al^3＋ ion doping on the magnetic properties of mnFe2-2x Al2xO4 （0 ≤x≤ 0.4） spinel ferrites was studied using moessbauer spectroscopy measurements at room temperature. From the moessbauer study, it is observed that the ：esolved hyperfine sextets are due to the distribution of Fe ions on the two sublattices of the spinel ferrites. The value of the isomer shift obtained from the fitting of the moessbauer spectra indicates that Fe ions are in ＋3 state. A paramagnetic doublet is observed at ：iegree of inversion x=0.4, superimposed on the hyperfine sextets, indicating that the super-exchange interaction A-B decreases due to ：he dilution of sublattice by Al^3＋ ions. The hyperfine magnetic field decreases at both interstitial sites of tetrahedral （A） and 3ctahedral （B） with the increase in Al concentration.

关键词： ferrites hyperfine interactions moessbauer spectroscopy isomer shift

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Influence of Y^(3+),Yb^(3+),Gd^(3+) cations on structural and electromagnetic properties of CuFe_(2)O_(4) nanoferrites prepared via one step sol-gel method

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Journal of Rare Earths 2021年第10期39卷 1224-1231,I0003页

作者： Aleena kiran majid Niaz Akhtar muhammad Yousaf khalid mujassam batoo Omar mAldossary Salman Naeem khan Department of Physics COMSATS University IslamabadLahore CampusDefence Road Off RaiwindLahore54000Pakistan Department of Physics Mohammad Nawaz Sharif University of Engineering and TechnologyMultan60000Pakistan School of Energy and Environment Southeast UniversityNo2 Si Pai LouNanjing 210096China king Abdullah Institute for Nanotechnology King Saud UniversityP.O.Box 2455Riyadh11458Saudi Arabia Department of Physics and Astronomy College of ScienceKing Saud UniversityP.O.Box-2455Riyadh11451Saudi Arabia micro-mm Wave Laboratory(m2L) Department of PhysicsCOMSATS University IslamabadLahore CampusDefence Road Off RaiwindLahore54000Pakistan

Rare earths(REs) play a key role in distorting spinel structure by creating some defects at the lattice sites and make them suitable for magnetodielectric *** the present study,the nanoferrites of CuRE0.02Fe1.98O4,where REs=Y^(3+),Yb^(3+),Gd^(3+),were prepared using one step sol-gel *** prepared samples are copper ferrite(CFO),yttrium doped copper ferrite(Y-CFO),ytterbium doped copper ferrite(Yb-CFO) and gadolinium doped copper ferrite(Gd-CFO),*** single-phase structure of all the REs doped nanoferrites was determined by X-ray diffraction(XRD) *** porosity,agglomerations and grain size of the REs doped copper ferrite were examined using field emission scanning electron microscopy(FESEm) *** transform infrared spectroscopy(FTIR)elaborates the phase formation and environmental effects on the REs doped nanoparticles(NPs).The recorded room temperature m-H loops from a vibrating sample magnetometer(VSm) elucidate the magnetic properties of the REs doped spinel *** magnetic saturation(ms) was calculated in the range of 23.08 to 51.78 emu/*** calculated coercivity values(272.6 to 705.60 Oe) confirm the soft magnetic behavior of REs doped copper ***,the electromagnetic and dielectric properties were assessed using a Vector network analyzer(VNA) from 1 to 6 *** permeability,permittivity,dielectric tangent loss and electric modulus of the REs doped spinel ferrites illustrate that the prepared NPs may be suitable for microwave and high frequency applications.

关键词： Rare earth elements Nanoparticles Spinel ferrites VSm VNA magnetodielectric applications

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Interdependence between electrical and magnetic properties of polycrystalline cobalt-substituted tungsten bronze multiferroic ceramics

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Journal of Advanced Dielectrics 2018年第1期8卷 17-24页

作者： Shilpi Jindal Sheela Devi Ajay Vasishth khalid mujasam batoo Gagan kumar Department of Physics Chandigarh University MohaliPunjabIndia Department of Applied Sciences MSITC-4 JanakpuriNew DelhiIndia Department of Applied Sciences Chandigarh Engineering College MohaliPunjabIndia king Abdullah Institute for Nanotechnology king Saud University P.O.Box 2455 Riyadh 11451Saudi Arabia

Polycrystalline cobalt-substituted tungsten bronze ferroelectric ceramics with chemical composition Ba_(5)CaTi_(2-x)Co_(X)Nb_(8)O_(30)(x=0.00,0.02,0.04 and 0.08)were synthesized by solid state reaction technique.X-ray diffraction(XRD)technique was used to confirm the phase formation and it revealed the formation of single phase tetragonal structure with space group *** surface morphology of the samples was studied by using the scanning electron microscopy(SEm)*** dielectric properties such as dielectric constant and dielectric loss have been investigated as a function of temperature and *** P-E and m-H studies confirmed the coexistent of ferroelectricity and magnetism at room *** P-E loop study indicated an increase in the coercive field while the m-H study depicted a decrease in the magnetization with the incorporation of cobalt ions.

关键词： Tungsten bronze solid state reaction technique:electrical properties magnetic properties

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A Current Review on the Synthesis and magnetic Properties of m-Type Hexaferrites material

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World Journal of Condensed matter Physics 2018年第2期8卷 36-61页

作者： Virender Pratap Singh Rohit Jasrotia Rajesh kumar Pankaj Raizada Sourbh Thakur khalid m. batoo m. Singh School of Physics & materials Science Shoolini University Bajhol Solan India Himalayan Centre of Excellence in Nanotechnology Shoolini University Bajhol Solan India Schoool of Chemistry Shoolini University Bajhol Solan India Intitute of material Science of kaunas University of Technology Barsausko Kaunas Lithuania king Abdullah Institute for Nanotechnology King Saud University Riyadh KSA Department of Physics Himachal Pradesh University Shimla India

After the discovery of hexagonal ferrites or hexaferrites, it has been become important materials commercially and technically to study which is still growing on. In this article, we have reviewed about the m-type hexaferrites including their structural, synthesis techniques and important magnetic properties. The role of experimental synthesizing techniques adopted for preparation of m-type hexaferrites on the various parameters studied in this review paper. The substitution of holonium in Bam ferrite reduces the value of coercivity but not saturation magnetization and ramanence and the cobalt-titanium substituted ferrites were the most important m-type ferrites in the field of application in microwave properties and magnetic field industry.

关键词： Hexagonal Structure Sol-Gel Synthesis Technique Co-Precipitation Technique TEm VSm

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Giant energy harvesting potential in(100)-oriented 0.68Pbmg_(1/3)Nb_(2/3)O_(3)-0.32PbTiO_(3)with Pb(Zr_(0.3)Ti_(0.7))O_(3)/PbO_(x)buffer layer and(001)-oriented 0.67Pbmg_(1/3)Nb_(2/3)O_(3)-0.33PbTiO_(3)thin films

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Journal of Advanced Dielectrics 2014年第4期4卷 18-23页

作者： Gaurav Vats Himmat Singh kushwaha Rahul Vaish Niyaz Ahamad madhar mohammed Shahabuddin Jafar m.Parakkandy khalid mujasam batoo School of Engineering Indian Institute of Technology mandi Himachal Pradesh 175001 India Department of Physics and Astronomy P.O.Box No.2455 College of SciencesKing Saud University Riyadh 11451Kingdom of Saudi Arabia king Abdullah Institute of Nanotechnology P.O.Box No.2455 King Saud UniversityRiyadh 11451 Kingdom of Saudi Arabia

This work emphasis on the competence of(100)-oriented PmN–PT buffer layered(0.68Pbmg_(1/3)Nb_(2/3)O_(3)–0.32PbTiO_(3)with Pb(Zr_(0.3)Ti_(0.7))O_(3)/PbO_(x)buffer layer)and(001)-oriented PmN–PT(0.67Pbmg_(1/3)Nb_(2/3)O_(3)–0.33PbTiO_(3))for low grade thermal energy harvesting using Olsen *** analysis(based on well-reported experiments in literature)reveals that these films show colossal energy harnessing *** the films are found to have maximum harnessable energy densities(PmN–PT buffer layered:8 mJ/m^(3);PmN–PT:6.5 mJ/m^(3))in identical ambient conditions of 30–150℃and 0–600 kV/*** energy harnessing plausibility is found to be nearly five times higher than the previously reported values to date.

关键词： Giant energy harvesting thin films Olsen cycle

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