Magnetic alloy nanowire arrays with different lengths: Insights into the crossover angle of magnetization reversal process

Samanifar, S.; Alikhani, M. E.; Kashi, M. Almasi; Ramazani, A.; Montazer, A.H.

doi:10.1016/j.jmmm.2017.01.060

Cited by 17 publications

(9 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The H c axis specifies the coercive field distribution of magnetic domains, and the H u axis indicates the presence or absence of magnetic interactions between constituent domains of NPs [48][49][50]. In this study, 30 step…”

Section: Forc Analysismentioning

confidence: 99%

Exploring the effect of Co concentration on magnetic hyperthermia properties of Co_xFe_3−xO₄ nanoparticles

Yasemian

Kashi

Ramazani

2020

Mater. Res. Express

View full text Add to dashboard Cite

Although enhanced ferrite nanoparticles (NPs) have been envisioned for use in future biomedical applications, less attempt has been made to tailoring and optimizing their detailed magnetic properties and specific loss power (SLP) values. Herein, Co x Fe 3−x O 4 (0 × 1) NPs are synthesized using a coprecipitation method at 80°C in the presence of air atmosphere. The effect of varying Co concentration on crystalline, morphological, magnetic and hyperthermia properties is also investigated in detail. Hysteresis loop measurements showed an increase in coercivity (H c ) from 7.75 to 340.50 Oe, and a decrease in saturation magnetization (M s ) from 59.10 to 32.70 emu g −1 with increasing x=0 (pure magnetite) to x=1 (pure Co ferrite), respectively. In addition to confirming the hysteresis loop results, first-order reversal curve (FORC) analysis estimated a 52% decrease in superparamagnetic (SP) fraction. Hyperthermia measurements carried out under an alternating magnetic field with intensity of 400 Oe and a frequency of 400 kHz showed an increase in SLP from x=0 to x=0.4, and a decrease in SLP for 0.4 <× 1. SLP was maximized at 395 W g −1 for the intermediate concentration of x=0.4. The optimized heat generation of Co 0.4 Fe 2.6 O 4 NPs comprising approximately 50%-50% SP-ferromagnetic fractions may result from the simultaneous contribution of the three following mechanisms: hysteresis loop loss, Brownian and Neel relaxation together with relatively high H c and moderate M s . Abbreviations (NPs) Nanoparticles (SLP) specific loss power (FORC) first-order reversal curve (SP) superparamagnetic (FESEM) field-emission scanning electron microscopy (H c ) coercivity (M s ) saturation magnetization (K) anisotropy constant

show abstract

Section: Forc Analysismentioning

confidence: 99%

Exploring the effect of Co concentration on magnetic hyperthermia properties of Co_xFe_3−xO₄ nanoparticles

Yasemian

Kashi

Ramazani

2020

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…Figure 27 ). Therefore, it appears that the non-monotonic variation of the angular dependence of hysteresis loop coercivity arises from the product of H FORC c and irreversible component [112,159]. In this respect, figure 28(f) shows the variation of [H FORC c × irreversible component] as a function of θ, being indicative of the non-monotonic variation during the magnetization reversal.…”

Section: Binary and Ternary Alloy Compoundsmentioning

confidence: 97%

“…Magnetic NWs consisting of binary and ternary alloy compounds such as FeNi, FeCo, NiCo, and FeCoNi are expected to show substantial influence of saturation magnetization and Curie temperature on the fundamental magnetic events and corresponding technological applications [77,112,170,171]. Among the binary and ternary magnetic alloy systems, FeNi NW arrays with different D NW (45-75 nm) and L NW (2.5-12 µm) fabricated using a PAED process into AAO templates have shown tunable magnetic domain states, including single domain, pseudo single domain, and multidomain, depending on the length and diameter [77].…”

Section: Binary and Ternary Alloy Compoundsmentioning

confidence: 99%

“…Therefore, it appears that the crossover angle taking place between the vortex and transverse magnetization reversal processes of high aspect ratio FeCoNi NWs is influenced by their morphology, which can in turn lead to the tuning of the properties of NWs purposely. To investigate the crossover angle of binary and ternary alloy NW arrays in detail, FeCo, FeNi and FeCoNi with different compositions and L NW (up to 80 µm) have been fabricated in hard anodized AAO templates with D p ∼ 175 nm, and their angular dependence of hysteresis loop coercivity has been investigated [112]. Figure 27 ).…”

Section: Binary and Ternary Alloy Compoundsmentioning

confidence: 99%

See 1 more Smart Citation

Template-based electrodeposited nonmagnetic and magnetic metal nanowire arrays as building blocks of future nanoscale applications

Kashi¹,

Montazer²

2022

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Realizing promising materials for use in next-generation devices at the nanoscale is of enormous importance from both fundamental and applied perspectives. Nonmagnetic and magnetic metal nanowire (NW) arrays fabricated by template-based electrodeposition (ED) techniques have long been considered as good candidates for this purpose. In this review, we focus on the fabrication techniques and characterizations of electrochemically deposited NWs with single, binary, ternary and multilayered component structures mostly carried out in our group. Particular attention is paid to the crystalline and magnetic characteristics (coercivity, squareness, magnetic phase, interactions and magnetization reversal modes) of NW arrays embedded in mild and hard anodized anodic aluminum oxide (AAO) templates with different pore diameters. The pulsed alternating current ED technique is proposed as a versatile approach in high-efficiency filling of the AAO templates, while also allowing for tuning magnetic properties of the resultant NWs. The first-order reversal curve analysis is also highlighted as an advanced characterization tool for nanomagnet arrays. Finally, potential cutting-edge nanoscale applications (magnetic information storage, energy storage and conversion, electronics, biosensing, microwave absorption and giant magnetoresistance) of magnetic NWs are presented.

show abstract

“…Furthermore, nanostructured materials based on irongroup alloys with diameters about, or smaller than 100 nm, can result in interesting properties. Thus, ferromagnetic (Fe, Co, Ni and related alloys) nanowires and nanotubes have gained attention recently due to the ability to tailor their magnetic properties [36][37][38][39][40], having potential applications in the fields of magneto-electronics [41], high sensitive giant magnetoresistance (GMR) sensors [42,43] or catalysis [44]. It has been found that coercivity, saturation magnetization, and remnant magnetization are strongly dependent on the size, morphology, crystalline structure and composition of nanowires [45,46].…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of Iron-Group Alloys into Nanostructured Oxide Membranes: Synthetic Challenges and Properties

Cesiulis

Tsytsaru

Podlaha

et al. 2018

CNANO

View full text Add to dashboard Cite

Background: Quasi-one dimensional nanostructures: nanowires, nanotubes, nanorods, nanobelts/nanoribbons and complex "nanowire-nanoparticle" composites have been synthesized over the years. These nanostructures are particularly appealing due to their specific properties defined by their high aspect ratio: two dimensions are in the nanoscale range and one dimension is in the microscale. Methods:One of the well-designed approaches for the synthesis of such nanostructured materials is template-assisted fabrication combined with electrodeposition. The fabrication approaches for the growth of iron-group alloy nanostructures inside nanoporous oxide membranes by means of different electrodeposition techniques, and the resulting unique properties and potential applications of this type of materials are reviewed. Results:Arrays of nanostructures can be obtained by filling a porous oxide template that contains a large number of straight cylindrical, nano-sized diameter holes. Generalities of metals electrodeposition into nanoporous oxide membranes are discussed. Measures to minimize the nonuniformity of deposits inside pores need to be addressed to thin the barrier layer, to control hydrogen evolution and to improve mass transport inside the pores. Examples of binary and ternary iron group alloys grown inside nanoporous oxide templates are provided. Catalytic hydrogen evolution and methanol oxidation on the nanowires arrays are described. The "sample size effect" on the magnetic properties of materials and the electrodeposition of multilayered structures necessary for giant magnetoresistance (GMR) are discussed in details. Conclusion:Electrodeposition of binary and ternary iron-group alloys confirm that controlling alloy composition inside nanopores is still a challenge. composites [7] have been synthesized over the years. These nanostructures are particularly appealing due to their specific properties defined by their high aspect ratio: two dimensions are in the nanoscale range and one dimension is in the microscale. One of the well-designed approaches for the synthesis of such nanostructured materials is template-assisted fabrication combined with electrodeposition, first reported by Possin [8] in track etched mica films, and expanded upon by others with different materials and templates [2,[9][10][11][12][13][14]. However, the self-organized porous anodic aluminum oxide (AAO) membrane has become one of the most often used templates for tunable synthesis of different nanostructured materials [15,16].

show abstract

Magnetic alloy nanowire arrays with different lengths: Insights into the crossover angle of magnetization reversal process

Cited by 17 publications

References 46 publications

Exploring the effect of Co concentration on magnetic hyperthermia properties of Co_xFe_3−xO₄ nanoparticles

Exploring the effect of Co concentration on magnetic hyperthermia properties of Co_xFe_3−xO₄ nanoparticles

Template-based electrodeposited nonmagnetic and magnetic metal nanowire arrays as building blocks of future nanoscale applications

Electrodeposition of Iron-Group Alloys into Nanostructured Oxide Membranes: Synthetic Challenges and Properties

Contact Info

Product

Resources

About

Magnetic alloy nanowire arrays with different lengths: Insights into the crossover angle of magnetization reversal process

Cited by 17 publications

References 46 publications

Exploring the effect of Co concentration on magnetic hyperthermia properties of CoxFe3−xO4 nanoparticles

Exploring the effect of Co concentration on magnetic hyperthermia properties of CoxFe3−xO4 nanoparticles

Template-based electrodeposited nonmagnetic and magnetic metal nanowire arrays as building blocks of future nanoscale applications

Electrodeposition of Iron-Group Alloys into Nanostructured Oxide Membranes: Synthetic Challenges and Properties

Contact Info

Product

Resources

About

Exploring the effect of Co concentration on magnetic hyperthermia properties of Co_xFe_3−xO₄ nanoparticles

Exploring the effect of Co concentration on magnetic hyperthermia properties of Co_xFe_3−xO₄ nanoparticles