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Magnetization

About: Magnetization is a research topic. Over the lifetime, 107872 publications have been published within this topic receiving 1969783 citations. The topic is also known as: magnetic polarization & magnetic induction.


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Journal ArticleDOI
TL;DR: In this article, a multilayer single-crystal films with 57Fe(100)/Ag(100) periods have been grown with Fe layers only 1.7 monolayers thick, using molecular beam epitaxy techniques.
Abstract: Multilayer single‐crystal films with 57Fe(100)/Ag(100) periods have been grown with Fe layers only 1.7 monolayers thick, using molecular‐beam epitaxy techniques. Reflection electron diffraction and Auger spectroscopy were used to establish the crystalline and chemical perfection of these samples. SQUID magnetometer measurements were made over 0–40 kOe and 10–300 K ranges. At 10 K it is easier to saturate the magnetization normal to the film than in its plane. Furthermore, there is a significant perpendicular remanence Mr. This indicates that the easy axis of magnetization is normal to the film. The strong temperature dependence of Mr suggests that thermally assisted domain‐wall motion exists in these samples. Mossbauer studies of the same sample (reported elsewhere) are consistent with the above behavior.

45 citations

Journal ArticleDOI
TL;DR: In this article, the magnetic and microwave absorption properties of the interstitial atom modified intermetallic compound Ce2Fe17NX have been investigated and it was found that this composite increases the Snoek limit and exhibits both high working frequency and permeability due to its high saturation magnetization.
Abstract: The magnetic and microwave absorption properties of the interstitial atom modified intermetallic compound Ce2Fe17NX have been investigated The Ce2Fe17NX compound shows a planar anisotropy with saturation magnetization of 1088 kA/m at room temperature The Ce2Fe17NX paraffin composite with a mass ratio of 1:1 exhibits a permeability of μ′ = 27 at low frequency, together with a reflection loss of −26 dB at 69 GHz with a thickness of 15 mm and −60 dB at 22 GHz with a thickness of 40 mm It was found that this composite increases the Snoek limit and exhibits both high working frequency and permeability due to its high saturation magnetization and high ratio of the c-axis anisotropy field to the basal plane anisotropy field Hence, it is possible that this composite can be used as a high-performance thin layer microwave absorber

45 citations

Journal ArticleDOI
TL;DR: This in vivo tumor study reveals that the tumor cells can be clearly diagnosed during an MRI scan and the tumor size is substantially reduced through hyperthermia therapy by using the same FePt@iron oxide nanoparticles, realizing the concept of theranostics.
Abstract: The controlled size and surface treatment of magnetic nanoparticles (NPs) make one-stage combination feasible for enhanced magnetic resonance imaging (MRI) contrast and effective hyperthermia. However, superparamagnetic behavior, essential for avoiding the aggregation of magnetic NPs, substantially limits their performance. Here, a superparamagnetic core-shell structure is developed, which promotes the formation of vortex-like intraparticle magnetization structures in the remanent state, leading to reduced dipolar interactions between two neighboring NPs, while during an MRI scan, the presence of a DC magnetic field induces the formation of NP chains, introducing increased local inhomogeneous dipole fields that enhance relaxivity. The core-shell NPs also reveal an augmented anisotropy, due to exchange coupling to the high anisotropy core, which enhances the specific absorption rate. This in vivo tumor study reveals that the tumor cells can be clearly diagnosed during an MRI scan and the tumor size is substantially reduced through hyperthermia therapy by using the same FePt@iron oxide nanoparticles, realizing the concept of theranostics.

45 citations

Journal ArticleDOI
TL;DR: In this article, the authors observed both a progressive enhancement of the ferrite's magnetic response and a shifting of its superparamagnetic limit when nanocrystalline copper ferrite (average grain size D ≈6 nm) is subjected to high-energy-milling in air over different periods up to 12 hours.

45 citations

Journal ArticleDOI
TL;DR: In this paper, the authors report on the systematic evolution of vortex pinning behavior in isovalent doped single crystals of BaFe and find a clear transformation of the magnetization hysteresis from a fishtail behavior to a distinct peak effect, followed by reversible magnetization and Bean-Livingston surface barriers.
Abstract: We report on the systematic evolution of vortex pinning behavior in isovalent doped single crystals of BaFe${}_{2}$(As${}_{1\ensuremath{-}x}$P${}_{x}$)${}_{2}$. Proceeding from optimal doped to overdoped samples, we find a clear transformation of the magnetization hysteresis from a fishtail behavior to a distinct peak effect, followed by a reversible magnetization and Bean-Livingston surface barriers. Strong point pinning dominates the vortex behavior at low fields whereas weak collective pinning determines the behavior at higher fields. In addition to doping effects, we show that particle irradiation by energetic protons can tune vortex pinning in these materials.

45 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20231,731
20223,619
20212,900
20203,149
20193,441
20183,401