A study of magnetic properties of Y–Ni–Mn substituted Co2Z-type nanohexaferrites via vibrating sample magnetometry

The influences of Gd concentration on martensitic transformation and magnetic properties of NiMnIn alloys were investigated by differential scanning calorimetry (DSC) , vibrating sample magnetometry (VSM), X-ray diffraction (XRD) and etc. It is Observed through the experiment: the addition of Gd enhances martensite transition temperature;X-ray diffraction analysis of experimental alloys is revealed that to the mixture is martensite and austenite at room temperature; content of Gd is not proportional to the improvement of magnetic property.

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Correlation of Microstructure with Hard Magnetic Properties of Glass-Coated MnBi Microwires

MRS Advances ◽

10.1557/adv.2018.664 ◽

2018 ◽

Vol 3 (62) ◽

pp. 3635-3640

Author(s):

J. Zamora ◽

I. Betancourt ◽

A. Jiménez ◽

R. Pérez del Real ◽

M. Vázquez

Keyword(s):

Magnetic Properties ◽

Intermetallic Phase ◽

Composition Analysis ◽

Vibrating Sample Magnetometry ◽

Thermal Dependence ◽

Intrinsic Coercivity ◽

Coercivity Field ◽

Chemical Composition Analysis ◽

Hard Magnetic Properties ◽

Intrinsic Coercivity Field

ABSTRACTIn this work, we study the hard-magnetic properties and its influence on the microstructure of MnBi-based glass-coated microwires obtained by Taylor-Ulitovsky process, as well as their magnetic and thermal dependence in the range of 200 K-360 K. We obtained glass-coated microwires pieces trough of the Taylor-Ulitovsky process. Glass-coated microwires exhibited the formation of Low-Temperature Intermetallic Phase (LTIP)-MnBi, as confirmed by scanning electron microscopy (SEM). Energy Dispersive Spectroscopy (EDS) elemental chemical composition analysis showed LTIP regions interspersed within Bi- and Mn-rich areas. Magnetic properties were determined by vibrating sample magnetometry (VSM), for which a considerable intrinsic coercivity field (iHc) up to 6000 Oe at 360 K, together with a saturation magnetization (Ms) of 57.49 emu/cm3. Therefore, this combination of properties renders LTIP is a promising precursor with potential for applications at high temperatures.

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Magnetic Properties of Al/Tb-Fe-Co Multilayer Thin Films

MRS Proceedings ◽

10.1557/proc-160-617 ◽

1989 ◽

Vol 160 ◽

Author(s):

J.A. Barnard ◽

B.D. Yan ◽

M.H. Kim ◽

G.W. Warren

Keyword(s):

Thin Films ◽

Magnetic Properties ◽

Dead Layer ◽

Multilayer Thin Films ◽

Vibrating Sample Magnetometry ◽

Dc Magnetron Sputtering ◽

Easy Magnetization ◽

Multilayer Systems ◽

Reduced Dimension ◽

Homogeneous Film

AbstractA series of periodic multilayer Al/Tb-Fe-Co thin films have been prepared by dc-magnetron sputtering. The films are of the form (xA/yB)n, where x and y are the thicknesses of the A and B layers respectively, and n is the number of bilayer units. Individual layers are from 2-40nm thick. The magnetic properties of the films have been measured as a function of Al and Tb-Fe-Co layer thicknesses by vibrating sample magnetometry (VSM). An homogeneous film of the Tb-Fe-Co alloy was grown under identical conditions and found to have in-plane easy magnetization. Pronounced interfacial and/or reduced dimension effects have been found in the multilayer systems. These include evidence for a “dead layer” in the interface regions (~2nm thick) and reversal of the direction of easy magnetization from in-plane (in the homogeneous thin film samples) to strongly perpendicular in the multilayer configuration.

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Influence of Magnetic Field on Magnetic Properties of Electrodeposited Co-Ni-P Nanowires

Communications in Physics ◽

10.15625/0868-3166/24/3s1/5233 ◽

2014 ◽

Vol 24 (3S1) ◽

pp. 90-94 ◽

Cited By ~ 1

Author(s):

Le Tuan Tu ◽

Luu Van Thiem ◽

Pham Duc Thang

Keyword(s):

Magnetic Field ◽

Magnetic Properties ◽

Room Temperature ◽

Hysteresis Loops ◽

Vibrating Sample Magnetometry ◽

X Ray Diffraction ◽

Xrd Pattern ◽

X Ray ◽

Structure And Morphology ◽

The Magnetic Field

The magnetic properties in Co-Ni-P nanowires arrays with diameter of 200 nm were investigated. All the samples were prepared by electrodeposition method with pH of 5.5 and at room temperature. During the deposition, a magnetic field in range of 0 - 750 Oe was applied parallel to the wires axis. The crystalline structure and morphology of the samples were characterized by X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM), respectively. The hysteresis loops were measured at room temperature using vibrating sample magnetometry (VSM). The mixture of hcp phases of the Co-Ni-P based nanowires has been indicated by the XRD pattern. The obtained results show that with 750 Oe magnetic field applied during deposition we can obtain maximum coercivity value (2180 Oe). The \(M_{r}/M_{s}\) ratio was rapid increased when the magnetic field changed from 0 Oe to 750 Oe.

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Solvothermal Synthesis of Carbon-Coated Nickel Nanoparticles in Ionic Liquid

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1058.52 ◽

2014 ◽

Vol 1058 ◽

pp. 52-55

Author(s):

Fu Yu Li ◽

Cun Ying Xu ◽

Ying Ya Yang ◽

Yi Xin Hua ◽

Jian Li

Keyword(s):

Magnetic Properties ◽

Ionic Liquid ◽

Solvothermal Synthesis ◽

Nickel Nanoparticles ◽

Solvothermal Method ◽

Vibrating Sample Magnetometry ◽

Transition Metal Nanoparticles ◽

X Ray ◽

Transmission Electron ◽

Carbon Coated

Carbon-coated nickel nanoparticles were synthesized by solvothermal method in 1-buty-3-methylimidazolium tetrafluoraborate ionic liquid. The obtained products are characterized by X-ray powder diffraction (XRD), Raman spectroscopy, infrared spectroscopy and transmission electron microscopy (TEM). The magnetic properties of carbon-coated nickel nanoparticles have been investigated by vibrating sample magnetometry (VSM). It was found that the carbon-coated nickel nanoparticles showed excellent magnetic properties. The present route may give researchers more choices for preparing other carbon-coated transition metal nanoparticles.

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Nanoemulsion Synthesis of Magnetic-Optical CoNiAu Nanoparticles

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.904.90 ◽

2014 ◽

Vol 904 ◽

pp. 90-94

Author(s):

Hong Qin Shao ◽

Zheng Guan ◽

Jun Hua Wu ◽

Hong Ling Liu

Keyword(s):

Magnetic Properties ◽

Biomedical Applications ◽

Room Temperature ◽

Vibrating Sample Magnetometry ◽

Tem Analysis ◽

X Ray ◽

Near Ir ◽

Transmission Electron ◽

Optical And Magnetic Properties

Multi-functional CoNiAu nanoparticles were successfully synthesized via nanoemulsion method with the use of PEO-PPO-PEO as the surfactant, C14H29CH(OH)CH2OH as the reducing agent, Ni (acac)2, Co (acac)2 and Au (ac)3 as precursors. The characterization of the CoNiAu nanoparticles was performed using X-ray powder diffraction (XRD), fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM) and UV-vis near IR spectrophotometer (UV-vis). The XRD and TEM analysis confirm the formation and structure of the nanoparticles. The UV-vis and VSM measurements display the optical and magnetic properties of the CoNiAu nanoparticles at the room temperature. The CoNiAu nanoparticles with the well defined optical and magnetic properties are promised for optical, magnetic, catalytic and biomedical applications.

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Adjusting Microstructure and Magnetic Properties of Ni-Mn-In Metamagnetic Shape Memory Alloys by Addition of Gd

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.535-537.959 ◽

2012 ◽

Vol 535-537 ◽

pp. 959-963

Author(s):

Li Na Bai ◽

Gui Xing Zheng ◽

Jing Xin ◽

Jian Jun Zhang

Keyword(s):

Magnetic Field ◽

Differential Scanning Calorimetry ◽

Magnetic Properties ◽

Shape Memory ◽

Room Temperature ◽

Vibrating Sample Magnetometry ◽

X Ray Diffraction ◽

Scanning Calorimetry ◽

X Ray ◽

Microstructure And Magnetic Properties

The influences of Gd concentration on martensitic transformation and magnetic properties of NiMnIn alloys were investigated by differential scanning calorimetry (DSC) , vibrating sample magnetometry (VSM), X-ray diffraction (XRD) and etc. It shows that addition of Gd enhances martensite transition temperature and that X-ray diffraction analysis of experimental alloys is revealed which the mixture is martensite and austenite at room temperature. These alloys show promise as a metamagnetic shape memory alloy with magnetic-field-induced shape memory effect.

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Microwave Synthesis and Characterizations of Ni0.5Zn0.5Fe2O4 Ferrite Powder

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.644.141 ◽

2013 ◽

Vol 644 ◽

pp. 141-144 ◽

Cited By ~ 1

Author(s):

Yuan Dong Peng ◽

Qing Lin Xia ◽

Li Ya Li ◽

Rui Bao ◽

Jun Ming Ran ◽

...

Keyword(s):

Magnetic Properties ◽

Ferrite Powder ◽

Vibrating Sample Magnetometry ◽

Stoichiometric Mixture ◽

Soaking Time ◽

X Ray ◽

Profile Fitting ◽

Zn Ferrite ◽

Intrinsic Coercivity ◽

Burning Method

Microwave heating method was used to synthesize (Ni0.5Zn0.5)Fe2O4 ferrite from a stoichiometric mixture of corresponding metal oxides powders. The structural, chemical and magnetic properties of Ni-Zn ferrite was determined by X-ray powder diffraction (XRD) and vibrating sample magnetometry (VSM). Results showed that the material was spinel structure with a high purity with an estimated crystallite size of ∼30nm by X-ray line profile fitting. The sample systhetized by microwave energy at 860°C for 30min has magnetic properties of intrinsic coercivity 55.94G and saturation magnetization 19.43 emu/g. Compared with conventional burning method, microwave systhesis of NiZn ferrite is more efficient and reducing a lots of soaking time.

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Structure and Magnetic Properties of FE/ZR Multilayer Films

MRS Proceedings ◽

10.1557/proc-313-731 ◽

1993 ◽

Vol 313 ◽

Author(s):

Toyohiko J. Konno ◽

Takenori Nakayama ◽

Bruce M. Clemens ◽

Robert Sinclair

Keyword(s):

Magnetic Properties ◽

Amorphous Layer ◽

Multilayer Films ◽

Amorphous Structure ◽

Asymptotic Model ◽

Vibrating Sample Magnetometry ◽

X Ray Diffraction ◽

X Ray ◽

Transmission Electron ◽

The One

ABSTRACTWe investigated structural and magnetic properties of Fe/Zr Multilayer films using high-resolution transmission electron Microscopy, X-ray diffraction and vibrating sample Magnetometry. For films with wavelength (Λ) ≥ 80Å, the interface region between the Fe and Zr layers exhibits a 15–20Å thick amorphous structure. The Magnetization curves of these films showed a monotonous decrease in the saturation magnetizations with Λ, whose trend is well explained by a simple asymptotic model that assumes the interface amorphous layer to be non-ferromagnetic. Films with Λ≤40Å exhibit a compositionally-Modulated amorphous structure. The latter films are paramagnetic except for the one with Λ=40Å, which showed a superparamagnetic behavior.

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