scholarly journals Determination of magnetic anisotropy constants and domain wall pinning energy of Fe/MgO(001) ultrathin film by anisotropic magnetoresistance

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Bo Hu ◽  
Wei He ◽  
Jun Ye ◽  
Jin Tang ◽  
Yong-Sheng Zhang ◽  
...  
Keyword(s):  
Domain Wall ◽  
Magnetic Anisotropy ◽  
Ultrathin Film ◽  
Anisotropic Magnetoresistance ◽  
Pinning Energy ◽  
Domain Wall Pinning

scholarly journals Determination of magnetic anisotropy constants in Fe ultrathin film on vicinal Si(111) by anisotropic magnetoresistance

2013 ◽  
Vol 3 (1) ◽  
Author(s):  
Jun Ye ◽  
Wei He ◽  
Qiong Wu ◽  
Hao-Liang Liu ◽  
Xiang-Qun Zhang ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Ultrathin Film ◽  
Anisotropic Magnetoresistance

scholarly journals Reduced domain wall pinning in ultrathin Pt/Co100−xBx/Pt with perpendicular magnetic anisotropy

2010 ◽  
Vol 96 (2) ◽  
pp. 022501 ◽  
Author(s):  
R. Lavrijsen ◽  
G. Malinowski ◽  
J. H. Franken ◽  
J. T. Kohlhepp ◽  
H. J. M. Swagten ◽  
...  
Keyword(s):  
Domain Wall ◽  
Magnetic Anisotropy ◽  
Perpendicular Magnetic Anisotropy ◽  
Domain Wall Pinning

scholarly journals Anisotropic Magnetoresistance State Space of Permalloy Nanowires with Domain Wall Pinning Geometry

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Héctor Corte-León ◽  
Vahid Nabaei ◽  
Alessandra Manzin ◽  
Jonathan Fletcher ◽  
Patryk Krzysteczko ◽  
...  
Keyword(s):  
Domain Wall ◽  
State Space ◽  
Anisotropic Magnetoresistance ◽  
Domain Wall Pinning

Controlled domain wall pinning in nanowires with perpendicular magnetic anisotropy by localized fringing fields

2014 ◽  
Vol 115 (17) ◽  
pp. 17D506 ◽  
Author(s):  
Stephan Breitkreutz ◽  
Irina Eichwald ◽  
Josef Kiermaier ◽  
Gaspard Hiblot ◽  
Gyorgy Csaba ◽  
...  
Keyword(s):  
Domain Wall ◽  
Magnetic Anisotropy ◽  
Perpendicular Magnetic Anisotropy ◽  
Domain Wall Pinning ◽  
Fringing Fields

Magnetization dynamics of irradiation-fabricated perpendicularly magnetized dots inside a softer magnetic matrix

2003 ◽  
Vol 777 ◽  
Author(s):  
T. Devolder ◽  
M. Belmeguenai ◽  
C. Chappert ◽  
H. Bernas ◽  
Y. Suzuki
Keyword(s):  
Domain Wall ◽  
Magnetic Anisotropy ◽  
Magnetization Reversal ◽  
Ion Irradiation ◽  
Magnetic Nanostructures ◽  
Magnetic Storage ◽  
Exchange Field ◽  
Static Magnetization ◽  
Specific Domain ◽  
Helium Ion

AbstractGlobal Helium ion irradiation can tune the magnetic properties of thin films, notably their magneto-crystalline anisotropy. Helium ion irradiation through nanofabricated masks can been used to produce sub-micron planar magnetic nanostructures of various types. Among these, perpendicularly magnetized dots in a matrix of weaker magnetic anisotropy are of special interest because their quasi-static magnetization reversal is nucleation-free and proceeds by a very specific domain wall injection from the magnetically “soft” matrix, which acts as a domain wall reservoir for the “hard” dot. This guarantees a remarkably weak coercivity dispersion. This new type of irradiation-fabricated magnetic device can also be designed to achieve high magnetic switching speeds, typically below 100 ps at a moderate applied field cost. The speed is obtained through the use of a very high effective magnetic field, and high resulting precession frequencies. During magnetization reversal, the effective field incorporates a significant exchange field, storing energy in the form of a domain wall surrounding a high magnetic anisotropy nanostructure's region of interest. The exchange field accelerates the reversal and lowers the cost in reversal field. Promising applications to magnetic storage are anticipated.

Determination of Intrinsic Magnetic Parameters of SmCo5 Phase in Sintered Samples

2005 ◽  
Vol 498-499 ◽  
pp. 129-133 ◽  
Author(s):  
Marcos Flavio de Campos ◽  
Fernando José Gomes Landgraf
Keyword(s):  
Powder Metallurgy ◽  
Domain Wall ◽  
Kerr Effect ◽  
Critical Diameter ◽  
Optical Microscope ◽  
Domain Theory ◽  
Magnetic Domains ◽  
Magnetic Parameters ◽  
Intrinsic Parameters

SmCo5 magnets are usually produced by powder metallurgy route, including milling, compaction and orientation under magnetic field, sintering and heat treatment. The samples produced by powder metallurgy, with grain size around 10 μm, are ideal for determination of intrinsic parameters. The first step for determination of intrinsic magnetic parameters is obtaining images of domain structure in demagnetized samples. In the present study, the domain images were produced by means of Kerr effect, in a optical microscope. After the test of several etchings, Nital appears as the most appropriate for observation of magnetic domains by Kerr effect. Applying Stereology and Domain Theory, several intrinsic parameters of SmCo5 phase were determined: domain wall energy 120 erg/cm2, critical diameter for single domain particle size 2 μm and domain wall thickness 60 Å. In the case of SmCo5, and also other phases with high magnetocrystalline anisotropy, Domain Theory presents several advantages when compared with Micromagnetics.

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