Evolutions of microstructure and magnetic property of wet-chemical synthesized FePt nanoparticles assisted by high magnetic field

2019 ◽  
Vol 797 ◽  
pp. 1372-1377 ◽  
Author(s):  
Xiao Duan ◽  
Chun Wu ◽  
Xiaoyang Wang ◽  
Xiaomin Tian ◽  
Wenli Pei ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Property ◽  
High Magnetic Field ◽  
Fept Nanoparticles ◽  
Wet Chemical

Tuning the Shape of FePt Nanoparticles by Applying High Magnetic Field in Wet-Chemical Process

2017 ◽  
Vol 17 (9) ◽  
pp. 7003-7007 ◽  
Author(s):  
Chun Wu ◽  
Wenli Pei ◽  
Fei Huang ◽  
Xiaoyang Wang ◽  
Kai Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Chemical Process ◽  
Fept Nanoparticles ◽  
Wet Chemical

Tailoring the shape and size of wet-chemical synthesized FePt nanoparticles by controlling nucleation and growth with a high magnetic field

Nanoscale ◽  
2019 ◽  
Vol 11 (32) ◽  
pp. 15023-15028 ◽  
Author(s):  
Chun Wu ◽  
Xiaoyang Wang ◽  
Wenli Pei ◽  
Dong Zhao ◽  
Kai Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Chemical Synthesis ◽  
High Magnetic Field ◽  
Growth Stage ◽  
Nucleation And Growth ◽  
Fept Nanoparticles ◽  
Wet Chemical Synthesis ◽  
Nucleation Stage ◽  
Wet Chemical ◽  
Shape And Size

A 6 Tesla high magnetic field (HMF) was separately introduced into the nucleation stage and growth stage and into both stages during the wet-chemical synthesis of FePt nanoparticles.

Improvements of Feedback Control Algorism in Two-Dimensional Vector Magnetic Property Measurements

2010 ◽  
Vol 670 ◽  
pp. 327-335 ◽  
Author(s):  
Takashi Todaka ◽  
Takeru Sato ◽  
Seiji Ishikawa ◽  
Yoshitaka Maeda ◽  
Masato Enokizono
Keyword(s):  
Magnetic Field ◽  
Magnetic Property ◽  
Feedback Control ◽  
Magnetic Flux ◽  
High Magnetic Field ◽  
Type I ◽  
Control Methods ◽  
Two Dimensional ◽  
Dimensional Vector ◽  
Fast Measurement

This paper presents comparison of feedback control algorisms of magnetic flux conditions in two-dimensional vector magnetic property measurements under high magnetic field over 1.6 T. In order to develop a fast measurement algorism, several PID feedback control methods were tested. The results show that the proportion-derivative precedence type (I-PD) control is suitable for reduction of measurement times in vector magnetic property measurements.

Effects of high magnetic field on the growth and magnetic property of L10-FePtCu nanoparticles

2021 ◽  
Vol 526 ◽  
pp. 167731
Author(s):  
Chun Wu ◽  
Dazhi Zheng ◽  
Xuelei Wang ◽  
Dong Zhao ◽  
Xiaoyang Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Property ◽  
High Magnetic Field

scholarly journals Inducing formation of L10-phase in concave-cube FePt nanoparticles by annealing under high magnetic field

2020 ◽  
Author(s):  
Chun Wu ◽  
Weibin Zhuang ◽  
Zhiyuan Niu ◽  
Dong Zhao ◽  
Wenli Pei ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Grain Size ◽  
High Temperature ◽  
High Magnetic Field ◽  
Annealing Process ◽  
Fept Nanoparticles ◽  
Effective Strategy ◽  
Ordering Degree

Abstract Concave-cube FePt nanoparticles (NPs) with anisotropy of shape and element were annealed under high magnetic field (HMF). The high temperature sphered the FePt NPs, and Pt content and grain size of the NPs were decreased during annealing process. The HMF strength didn’t affect the shape, size and composition of the FePt NPs, but induced the formation of L 1 0 -phase in the annealed NPs. The content and ordering degree of L 1 0 -phase increased with enhancing the HMF strength, which leaded to the increasing of coercivity in the annealed FePt NPs. This work suggests that application of the HMF annealing is an effective strategy to tune the microstructure and property of anisotropic FePt NPs.

scholarly journals Effect of Cr Content on the Properties of Magnetic Field Processed Cr-Doped ZnO-Diluted Magnetic Semiconductors

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Shiwei Wang ◽  
Weiqiang Bo ◽  
Min Zhong ◽  
Cong Liu ◽  
Ying Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Property ◽  
Crystal Lattice ◽  
High Magnetic Field ◽  
Diluted Magnetic Semiconductors ◽  
Diluted Magnetic Semiconductor ◽  
Hexagonal Wurtzite Structure ◽  
Ferromagnetic Behavior ◽  
Doped Zno ◽  
Diluted Magnetic

Cr-doped ZnO-diluted magnetic semiconductor (DMS) nanocrystals with various Cr contents were synthesized by hydrothermal method under high magnetic field. The result indicated that both the amount of Cr contents and high magnetic field significantly influenced crystal structure, morphology, and magnetic property of Cr-doped ZnO DMSs. When the Cr contents increased from 1 at% to 5 at%, the morphology of grains sequentially changed from flower-like to rod-like and then to the flake-like form. All the samples remained hexagonal wurtzite structure after Cr ions were doped into the ZnO crystal lattice. The Cr doping led to the increasing amount of defects and even enhanced the magnetic property of the matrix materials. All the Cr-doped ZnO DMSs obtained under high magnetic field exhibited obvious ferromagnetic behavior at room temperature. The results have also shown the successful substitution of the Cr3+ions for the Zn2+ions in the crystal lattice.

scholarly journals Effects of high magnetic field annealing on FePt nanoparticles with shape-anisotropy and element-distribution-anisotropy

RSC Advances ◽  
2021 ◽  
Vol 11 (18) ◽  
pp. 10463-10467
Author(s):  
Chun Wu ◽  
Yanan Jiang ◽  
Zhiyuan Niu ◽  
Dong Zhao ◽  
Wenli Pei ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Element Distribution ◽  
Shape Anisotropy ◽  
Fept Nanoparticles ◽  
Field Annealing

The concave-cube FePt nanoparticles (NPs) with shape-anisotropy and element-distribution-anisotropy were annealed under a high magnetic field (HMF).

Synthesis of super-fine L10-FePt nanoparticles with high ordering degree by two-step sintering under high magnetic field

2021 ◽  
Vol 73 ◽  
pp. 178-185 ◽  
Author(s):  
Dong Zhao ◽  
Xiaoyang Wang ◽  
Ling Chang ◽  
Wenli Pei ◽  
Chun Wu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Fept Nanoparticles ◽  
Ordering Degree
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