Influence of Organic Additive Benzene Sulfamide on the Magnetic Behavior of Electrodeposited CoMnP Thin Film Alloys

2019 ◽  
Vol 17 (11) ◽  
pp. 909-912
Author(s):  
M.RM. Krishnappa ◽  
K.V. Kannan Nithin
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Current Density ◽  
Ph Value ◽  
Magnetic Behavior ◽  
Organic Additive ◽  
Additive Concentration ◽  
Electro Deposition ◽  
Nano Crystalline ◽  
Micro Cracks

Electro deposition of CoMnP thin films was carried out for different concentrations of organic additive Benzene sulfamide at a constant bath pH value and for various current density. Magnetic properties such as coercivity, saturation magnetization and the surface morphology were investigated for electrodeposited CoMnP thin films. The characteristics of the CoMnP thin films were found to attain enhanced values, because of the variation in the concentration of the bath solution. The Scanning Electron Microscope (SEM) micrographs of the CoMnP thin films for various bath compositions and additive concentration exhibited different micro cracks. From the X-ray diffraction pattern, structure of the CoMnP alloy films was analyzed and it was found to be Hesagonal Close Packed (HCP) structures with the dominant microstructure and all the co-deposited thin films were found to exhibit Nano crystalline structure. The magnetic properties of the specimens were characterized using Vibrating Sample Magnetometer (VSM). Adhesion and hardness of the electroplated films influenced by organic additive Benzene Sulfamide were also investigated. The magnetic properties were highly influenced by the addition of the organic additive Benzene Sulfamide for various bath composition and bath conditions. Under best condition involving addition of 0.2 M of NaH2PO2 and 2 g/L of Benzene Sulfamide acid at current density 5 mA/cm2 and time of deposition 60 Minutes, the thickness of the film was found to be 4.6 micrometer with coercivity 1500 Oe.

Current Density Effects on the Structural and Magnetic Properties of CoNiFe Alloy Thin Films

2011 ◽  
Author(s):  
K. Sundaram ◽  
V. Dhanasekaran ◽  
T. Mahalingam ◽  
M. Raja ◽  
Takeyu Kim ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Current Density ◽  
Density Effects ◽  
Structural And Magnetic Properties

Fabrication of CoNiP Thin Films with Improved Magnetic Property for Application in MEMS

2016 ◽  
Vol 860 ◽  
pp. 87-92 ◽  
Author(s):  
M.S. Haque ◽  
M.F. Rahman ◽  
M.M. Zaman ◽  
M.A. Matin ◽  
A.K.M.A. Hakim ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Ambient Temperature ◽  
Current Density ◽  
Copper Substrate ◽  
Cobalt Nickel ◽  
Magnetization Saturation ◽  
High Density Recording ◽  
Increasing Temperature ◽  
Cracking Tendency

This paper reports on fabricated hard magnetic cobalt nickel phosphorous (CoNiP) films with electro-chemically deposition technique on copper substrate in the presence of different urea (0 to 10 g/L) and NaH2PO2 (16 to 21 g/L) concentrations. Thin films were obtained at current density ranges from 5 to 20 mA/cm2 and temperature varies from ambient temperature to 60°C. Magnetic properties namely coercivity, remanent magnetization, saturation magnetization and squareness of the films were studied using Vibrating Sample Magnetometer (VSM). The result showed that for bath containing higher concentration of urea (10 g/L), bright films with higher coercivity were obtained at moderate current density (15 mA/cm2) and at higher temperatures (40-60°C). In contrary, uniform and bright films were produced at ambient temperature in bath containing no urea or lower concentration of urea. Scanning Electron Microscopy (SEM) revealed that porosity and cracking tendency are increased with increasing temperature. CoNiP thin films with improved magnetic properties are thus obtained for plausible applications in high density recording media and MEMS.

Magnetic Properties of Epitaxial Mbe-Grown thin Fe3O4 Films on MgO (100)

1995 ◽  
Vol 384 ◽  
Author(s):  
P.A.A. Van Der Heijden ◽  
J.J. Hammink ◽  
PJ.H. Bloemen ◽  
R.M. Wolf ◽  
M.G. Van Opstal ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Molecular Beam Epitaxy ◽  
Single Crystal ◽  
Ferromagnetic Resonance ◽  
Kerr Effect ◽  
Molecular Beam ◽  
Magnetic Behavior ◽  
Optical Kerr Effect ◽  
Magneto Optical Kerr Effect

ABSTRACTCoherent epitaxial Fe3O4 layers in the range of 0 to 400 Å have been grown by molecular beam epitaxy on single crystal MgO(100) substrates. The magnetic properties were studied by local magneto-optical Kerr effect experiments on a wedge shaped Fe3O4 layer, by ferromagnetic resonance and SQUID. The results show that the magnetic behavior of the Fe3O4 thin films resembles bulk Fe3O4 in the investigated thickness range.

scholarly journals ANOMALOUS ELECTRODEPOSITION OF Fe-Ni ALLOY COATING FROM SIMPLE AND COMPLEX BATHS AND ITS MAGNETIC PROPERTY

2010 ◽  
Vol 10 (2) ◽  
pp. 108-122 ◽  
Author(s):  
M A Islam
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Magnetic Property ◽  
Current Density ◽  
Coarse Grained ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Alloy Electrodeposition ◽  
Ni Alloys ◽  
Ni Alloy

Electrodeposition of Fe-Ni thin films has been carried on copper substrate under various electrodeposition conditions from two simple and six complex baths. Sulfate baths composing of NiSO4. 7H2O, FeSO4.7H2O, H3BO3 and Na2SO4KEYWORDS: Anomalous Electrodeposition, Fe-Ni Coating, Complexing agent, Current Density, Magnetic Property. 1. INTRODUCTION Alloy electrodeposition technologies can extend tremendously the potential of electrochemical deposition processes to provide coatings that require unique mechanical, chemical and physical properties [1]. There has been a great research interest in the development and characterization of iron-nickel (Fe-Ni) thin films due to their operational capacity, economic interest, magnetic and other properties [2]. Due to their unique low coefficient of thermal expansion (CTE) and soft magnetic properties, Fe-Ni alloys have been used in industrial applications for over 100 years [3]. Typical examples of applications that are based on the low CTE of Fe-Ni alloys include: thermostatic bimetals, glass sealing, integrated circuit packaging, cathode ray tube, shadow masks, membranes for liquid natural gas tankers; applications based on the soft magnetic properties include: read-write heads for magnetic storage, magnetic actuators, magnetic shielding, high performance transformer cores. comprise the simple baths whereas complex baths were prepared by adding ascorbic acid, saccharin and citric acid in simple baths. The effect of bath composition, pH and applied current density on coating appearance, composition, morphology and magnetic property were studied. Wet chemical analysis technique was used to analyze the coating composition whereas SEM and VSM were used to study the deposit morphology and magnetic property respectively. Addition of complexing agents in plating baths suppressed the anomalous nature of Fe-Ni alloy electrodeposition. Coatings obtained from simple baths were characterized by coarse grained non-smooth surface with/without microcracks onto it whereas those from complex baths were fine grained with smooth surfaces. Satisfactory saturation magnetization value of 131.13 emu/g in coating was obtained from simple bath. Coatings obtained from complex baths did not show normal magnetization behavior.

scholarly journals Magnetic Properties of Electrodeposited Cobalt-Platinum (CoPt) and Cobalt-Platinum-Phosphide (CoPtP) Thin Films

2021 ◽  
Vol 9 ◽  
Author(s):  
D.-Y. Park ◽  
N. V. Myung
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Current Density ◽  
Electrolyte Composition ◽  
Sodium Hypophosphite ◽  
Alkaline Solutions ◽  
Chemical Compositions ◽  
Solution Ph ◽  
Cobalt Pyrophosphate ◽  
Microstructure And Magnetic Properties

CoPt and CoPtP thin films were synthesized using direct current (DC) aqueous electrodeposition from weak alkaline solutions. The basic plating solutions of binary CoPt thin films consisted of cobalt pyrophosphate [Co2P2O7] and chloroplatinic acid [H2PtCl6]. Various amounts of sodium hypophosphite [NaH2PO2] was added to deposit ternary CoPtP thin films. The film composition was adjusted by varying the several electrodeposition parameters including electrolyte composition, solution pH, and current density and correlated to their microstructure and magnetic property (i.e. coercivity and squareness). For the binary CoPt thin films, the maximum coercivities [in-plane coercivity (Hc,//) = ∼1,600 Oe, and perpendicular coercivity (Hc,⊥) = ∼2,500 Oe] were obtained from electrolytes containing 0.01 M H2PtCl6 + 0.04 M Co2P2O7 at current density (CD) of 7.5 mA cm−2. In the case of ternary CoPtP electrodeposits, the maximum coercivities (Hc,// = ∼2,600 Oe, and Hc,⊥ = ∼3,800 Oe) were achieved from baths containing 0.015 M H2PtCl6, 0.07 M Co2P2O7, 0.8 M NaH2PO2 at CD of 7.5 mA cm−2 and solution pH 9. It was suggested that microstructure and magnetic properties are affected not only by the type of substrate but also by chemical compositions and electrodeposition conditions.

Cutoff Frequency Study on Nanocrystalline FeNbB Thin Films

2012 ◽  
Vol 465 ◽  
pp. 72-75
Author(s):  
Xiao Long Jiang ◽  
Y.J. Yao ◽  
M. Lai ◽  
K. Peng ◽  
Y.W. Du
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Room Temperature ◽  
Ion Beam ◽  
Cutoff Frequency ◽  
Magnetic Behavior ◽  
Soft Magnetic Properties ◽  
Ion Beam Sputtering ◽  
Soft Magnetic ◽  
Beam Sputtering

A series of nanocrystalline FeNbB films were fabricated using ion-beam sputtering technique from FeNbB target. Pieces of these films were annealed for 1 hour at various temperatures up to 5730C. Room temperature soft magnetic properties of these films were measured. The influence of microstructure on magnetic behavior in nanocrystalline FeNbB films is investigated in a series of specimens with different film’s thickness. For the sample 120nm and 5000C annealed, cutoff frequency was found to be 5E7 Hz, which has the μf0=5E10.

Optical Transmittance and Band Gap of Electrodeposited Cu2O/ITO Layers

2010 ◽  
Vol 34-35 ◽  
pp. 1421-1424
Author(s):  
Fei Hu ◽  
Zhi Yu He ◽  
Xiao Hong Li ◽  
Yue Hui Hu
Keyword(s):  
Thin Films ◽  
Current Density ◽  
Cuprous Oxide ◽  
Ph Value ◽  
Optical Transmittance ◽  
Band Gaps ◽  
Optical Band Gaps ◽  
Vis Spectroscopy ◽  
Cu2o Films ◽  
Cu2o Thin Films

Cuprous oxide films are successfully electrodeposited through the reduction of cupric ions in alkaline and acid electrolytes. The effect of electrodeposition parameters on the optical band gaps of Cu2O films is investigated using UV-vis spectroscopy. It is found that the optical transmittances and the band gaps of the Cu2O thin films are strongly influenced by the electrodeposition bath, the temperature, the current density, and the pH value. The band gaps are varied from 1.80 eV to 2.43 eV with different electrodeposition parameters.

Epitaxial Growth and Magnetic Behavior of (Ni,Zn)Fe2O4 Thin Films on Si Substrate Using Designed Buffer Layers for Novel Memory Application

2002 ◽  
Vol 747 ◽  
Author(s):  
Naoki Wakiya ◽  
Kazuo Shinozaki ◽  
Nobuyasu Mizutani
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Remanent Magnetization ◽  
Zinc Ferrite ◽  
Lattice Mismatch ◽  
Magnetic Behavior ◽  
Buffer Layers ◽  
Si Substrate ◽  
Antiphase Boundaries ◽  
Nickel Zinc

ABSTRACTEpitaxial nickel zinc ferrite (Ni,Zn)Fe2O4 (NZF) thin films were successfully deposited on (MgO-Al2O3)/CeO2/YSZ/Si(001) substrates, where (MgO-Al2O3) is MgO doped with Al2O3. The crystallographic orientation and magnetic properties (saturation magnetization: Ms, and squareness: Mr/Ms where Mr is remanent magnetization) of NZF thin films were considerably changed with the amount of Al2O3 addition. If the amount of Al2O3 addition was less than 7 mol%, (001)-oriented epitaxial NZF thin films were obtained and the films had low squareness (around 45%). If the amount of Al2O3 addition was more than 7 mol%, (111)-oriented epitaxial NZF thin films were obtained and the films had high squareness (around 60–81%). Maximum squareness (81%) was obtained if the amount of Al2O3 addition was 26 mol%. For the sample with this Al2O3 content, the lattice mismatch between NZF and (MgO-Al2O3) buffer layer was 3.2%. The fact that high squareness was not obtained if lattice mismatch was very small (-0.3% on MgO) but obtained if lattice mismatch was 3.2% suggests that lattice mismatch to a certain content is important to avoid the formation of antiphase boundaries (APBs). This consideration was confirmed by examining other buffer layers having various lattice mismatches with NZF.

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