scholarly journals Tuning Easy Magnetization Direction and Magnetostatic Interactions in High Aspect Ratio Nanowires

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3042
Author(s):  
Hafsa Khurshid ◽  
Rahana Yoosuf ◽  
Bashar Afif Issa ◽  
Atta G. Attaelmanan ◽  
George Hadjipanayis
Keyword(s):  
Magnetic Properties ◽  
Uniaxial Anisotropy ◽  
Growth Direction ◽  
Diameter Ratio ◽  
Nanowire Growth ◽  
Dipolar Interactions ◽  
Easy Magnetization ◽  
Magnetization Direction ◽  
Cobalt Nanowires ◽  
Easy Magnetization Direction

Cobalt nanowires have been synthesized by electrochemical deposition using track-etched anodized aluminum oxide (AAO) templates. Nanowires with varying spacing-to-diameter ratios were prepared, and their magnetic properties were investigated. It is found that the nanowires’ easy magnetization direction switches from parallel to perpendicular to the nanowire growth direction when the nanowire’s spacing-to-diameter ratio is reduced below 0.7, or when the nanowires’ packing density is increased above 5%. Upon further reduction in the spacing-to-diameter ratio, nanowires’ magnetic properties exhibit an isotropic behavior. Apart from shape anisotropy, strong dipolar interactions among nanowires facilitate additional uniaxial anisotropy, favoring an easy magnetization direction perpendicular to their growth direction. The magnetic interactions among the nanowires were studied using the standard method of remanence curves. The demagnetization curves and Delta m (Δm) plots showed that the nanowires interact via dipolar interactions that act as an additional uniaxial anisotropy favoring an easy magnetization direction perpendicular to the nanowire growth direction. The broadening of the dipolar component of Δm plots indicate an increase in the switching field distribution with the increase in the nanowires’ diameter. Our findings provide an important insight into the magnetic behavior of cobalt nanowires, meaning that it is crucial to design them according to the specific requirements for the application purposes.

Magnetic Properties of a HoFe5Al7 Single Crystal

2012 ◽  
Vol 194 ◽  
pp. 54-57 ◽  
Author(s):  
Denis I. Gorbunov ◽  
Alexandr V. Andreev
Keyword(s):  
Magnetic Properties ◽  
Single Crystal ◽  
Basal Plane ◽  
Magnetic Transition ◽  
High Coercivity ◽  
Strong Anisotropy ◽  
Easy Magnetization ◽  
Magnetization Direction ◽  
Plane Anisotropy ◽  
Easy Magnetization Direction

A single crystal of HoFe5Al7 (tetragonal ThMn12 structure) has been studied. HoFe5Al7 orders ferrimagnetically at TC = 227 K and has a compensation of the Ho and Fe sublattices at Tcomp = 65 K. The compound exhibits high easy-plane anisotropy. Strong anisotropy is also present within the basal plane, with the [110] axis being the easy magnetization direction. A high coercivity with Hc values attaining 1.6 T is found at 2 K. In the temperature range 40-80 K, HoFe5Al7 displays a field-induced magnetic transition along the easy [110] direction. Temperature dependence of the critical field Hcr of the transition is very strong, Hcr exceeds 14 T below 40 K.

The Influences of Depositing Angles on TbFe Film Magnetic and Magnetostrictive Characteristics

2005 ◽  
Vol 475-479 ◽  
pp. 3757-3760
Author(s):  
Hong Chuan Jiang ◽  
Wan Li Zhang ◽  
Bin Peng ◽  
Wen Xu Zhang ◽  
Shi Qing Yang
Keyword(s):  
External Field ◽  
Magnetic Domain ◽  
Grain Morphology ◽  
Dc Magnetron Sputtering ◽  
Easy Magnetization ◽  
Magnetization Direction ◽  
Saturation Field ◽  
Domain Structures ◽  
Columnar Grain ◽  
Easy Magnetization Direction

In this paper, the influences of depositing angles on TbFe film magnetic and magnetostrictive characteristics were discussed. TbFe films were deposited by DC magnetron sputtering. With the decrease of depositing angles from 900 to 150, TbFe film in-plane magnetization measured at 1600kA.m-1 external field is greatly increased. With the decrease of depositing angles from 900 to 150, the magnetostrictive saturation field is decreased. TbFe film in-plane magnetostriction is improved when depositing angles are changed from 900 to 150. Magnetic domain structures detected by MFM indicates that film easy magnetization direction is gradually changed from perpendicular to parallel with the decrease of depositing angles. The variation of film magnetic and magnetostrictive performances can be explained by the oblique anisotropy associated with columnar grain morphology of the films.

Structural and Magnetic Properties of Ho3Fe29-xTx (T=V and Cr) Compounds

2013 ◽  
Vol 669 ◽  
pp. 46-50
Author(s):  
Y.N. Han ◽  
X.F. Han ◽  
H.L. Liu
Keyword(s):  
Magnetic Properties ◽  
Magnetic Measurements ◽  
Structural Characteristics ◽  
X Ray Diffraction ◽  
Critical Fields ◽  
Easy Magnetization ◽  
Magnetization Direction ◽  
Xrd Pattern ◽  
Magnetically Aligned ◽  
Good Agreement

The crystallographic structural characteristics and magnetic properties of Ho3Fe29-xTx (T=V and Cr) compounds have been investigated by using Rietveld refinement analysis of X-ray diffraction (XRD) pattern and magnetic measurements. The calculated results indicate that among the 11 different kinds of Fe sites in these Ho-Fe compounds the preferential sites of the stabilizing elements V and Cr are quite different. The refined lattice parameters of these compounds are in good agreement with the experimental data. Spin reorientations of easy magnetization direction (EMD) are observed at around 150 K for Ho3Fe27V2 and Ho3Fe25.5Cr3.5. At the around 1.7 T critical fields (HCR) first order magnetization process (FOMP) occurs in magnetization curves at 4.2 K for the magnetically aligned samples of Ho3Fe27V2 and Ho3Fe25.5Cr3.5.

Change of easy magnetization direction in TmMn6Sn6−xGax (0.00

2006 ◽  
Vol 408-412 ◽  
pp. 196-199 ◽  
Author(s):  
Y. Sawai ◽  
K. Kindo ◽  
L. Zhang ◽  
J.C.P. Klaasse ◽  
E. Brück ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
High Magnetic Fields ◽  
Easy Magnetization ◽  
Magnetization Direction ◽  
Easy Magnetization Direction

Influence of Tb on easy magnetization direction and magnetostriction of PrFe 1.9 alloy

2019 ◽  
Vol 28 (11) ◽  
pp. 117501 ◽  
Author(s):  
Chang-Xuan He ◽  
Yan-Mei Tang ◽  
Xiang Li ◽  
Yun He ◽  
Cai-Yan Lu ◽  
...  
Keyword(s):  
Easy Magnetization ◽  
Magnetization Direction ◽  
Easy Magnetization Direction

scholarly journals Highly spin-polarized electronic structure and magnetic properties of Mn2.25Co0.75Al1−xGex Heusler alloys: first-principles calculations

RSC Advances ◽  
2020 ◽  
Vol 10 (38) ◽  
pp. 22556-22569
Author(s):  
Yue Wang ◽  
Liying Wang ◽  
Wenbo Mi
Keyword(s):  
First Principles ◽  
Heusler Alloys ◽  
Lattice Deformation ◽  
First Principles Calculations ◽  
Easy Magnetization ◽  
Magnetization Direction ◽  
Spin Polarized ◽  
Out Of Plane ◽  
Plane Direction ◽  
Easy Magnetization Direction

The complete spin polarizations of Mn2.25Co0.75Al1−xGex are proved to be robust against stoichiometric defect and lattice deformation, whose easy magnetization direction can be manipulated from in-plane direction to out-of-plane one under uniaxial strain.

Crystal Structure and Magnetic Properties of Novel Compound PrFe8Ga3C

2009 ◽  
Vol 152-153 ◽  
pp. 75-78 ◽  
Author(s):  
V.S. Gaviko ◽  
A.G. Popov ◽  
G.V. Ivanova ◽  
N.V. Mushnikov ◽  
Y.V. Belozerov ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Room Temperature ◽  
Spontaneous Magnetization ◽  
Anisotropy Constant ◽  
X Ray Diffraction ◽  
Easy Magnetization ◽  
Magnetization Direction ◽  
X Ray ◽  
Powder Samples ◽  
Curie Temperature Tc

We have synthesized a novel intermetallic compound PrFe8Ga3C and studied its structure and magnetic properties. X-ray diffraction analysis revealed that the compound possesses a tetragonal BaCd11-type structure (space group I41/amd). In this structure Ga atoms occupy the same sites as Fe atoms with preferably filling the 4(b) site. Magnetization curves have been measured on the aligned powder samples. Below the Curie temperature TC = 400 K the easy magnetization direction was found to orient within the (100) plane. At 80 K the compound has a spontaneous magnetization of 97 emu/g and anisotropy constant of 4.2107 erg/cm3. At room temperature these values reduce to 78 emu/g and 4.7106 erg/cm3, respectively.

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