Influence of the magnetization vector misalignment on the magnetic force of permanent ring magnet and soft magnetic cylinder

2020 ◽  
pp. 1-14
Author(s):  
Ana N. Vučković ◽  
Dušan M. Vučković ◽  
Mirjana T. Perić ◽  
Nebojša B. Raičević
Keyword(s):  
Magnetic Force ◽  
Magnetization Vector ◽  
Soft Magnetic ◽  
Ring Magnet

scholarly journals Magnetic Driven Two-Finger Micro-Hand with Soft Magnetic End-Effector for Force-Controlled Stable Manipulation in Microscale

Micromachines ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 410
Author(s):  
Dan Liu ◽  
Xiaoming Liu ◽  
Pengyun Li ◽  
Xiaoqing Tang ◽  
Masaru Kojima ◽  
...  
Keyword(s):  
Magnetic Force ◽  
Force Feedback ◽  
Soft Magnetic ◽  
End Effector ◽  
Force Microscopy ◽  
System A ◽  
Atomic Force ◽  
Afm Probe ◽  
End Effectors ◽  
Fixed End

In recent years, micromanipulators have provided the ability to interact with micro-objects in industrial and biomedical fields. However, traditional manipulators still encounter challenges in gaining the force feedback at the micro-scale. In this paper, we present a micronewton force-controlled two-finger microhand with a soft magnetic end-effector for stable grasping. In this system, a homemade electromagnet was used as the driving device to execute micro-objects manipulation. There were two soft end-effectors with diameters of 300 μm. One was a fixed end-effector that was only made of hydrogel, and the other one was a magnetic end-effector that contained a uniform mixture of polydimethylsiloxane (PDMS) and paramagnetic particles. The magnetic force on the soft magnetic end-effector was calibrated using an atomic force microscopy (AFM) probe. The performance tests demonstrated that the magnetically driven soft microhand had a grasping range of 0–260 μm, which allowed a clamping force with a resolution of 0.48 μN. The stable grasping capability of the magnetically driven soft microhand was validated by grasping different sized microbeads, transport under different velocities, and assembly of microbeads. The proposed system enables force-controlled manipulation, and we believe it has great potential in biological and industrial micromanipulation.

Magnetic Structure and Magnetization Reversal in Nanocomposite Pr2Fe14B/α-Fe Ribbons

2005 ◽  
Vol 475-479 ◽  
pp. 2127-2130
Author(s):  
Xiaoqian Bao ◽  
Mao Cai Zhang ◽  
Yi Qiao ◽  
Shouzeng Zhou
Keyword(s):  
Magnetization Reversal ◽  
Exchange Coupling ◽  
Melt Spinning ◽  
Magnetic Force ◽  
Permanent Magnets ◽  
Soft Magnetic ◽  
Force Microscopy ◽  
Interaction Domains ◽  
Strong Exchange ◽  
Pinning Field

Nanocomposite Pr7.5Dy1Fe71Co15Nb1B4.5 ribbons were prepared by melt-spinning and subsequent annealing. Interaction domains were imaged using magnetic force microscopy (MFM) because of strong exchange coupling between hard and soft magnetic grains. Coercivity was determined by exchange coupling pinning field. But the magnetization reversal of nanocomposite magnets were different from that of traditional single phase permanent magnets.

Magnetic force microscopy of soft magnetic materials

1996 ◽  
Vol 157-158 ◽  
pp. 555-556 ◽  
Author(s):  
M.S. Valera ◽  
S.L. Tomlinson ◽  
G.P. Heydon ◽  
A.N. Farley ◽  
S.R. Hoon ◽  
...  
Keyword(s):  
Magnetic Materials ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Soft Magnetic Materials ◽  
Soft Magnetic ◽  
Force Microscopy

Magnetic Properties of Nanocrystalline Fe50Co50 Powders

2003 ◽  
Vol 788 ◽  
Author(s):  
Shashishekar Basavaraju ◽  
Ian Baker
Keyword(s):  
Grain Size ◽  
Magnetic Properties ◽  
Magnetic Force ◽  
Milling Time ◽  
Magnetic Behavior ◽  
High Energy ◽  
Soft Magnetic ◽  
Scanning Calorimetry ◽  
High Energy Ball Mill ◽  
Energy Ball

ABSTRACTNanocrystalline stoichiometric FeCo powders were prepared by mechanically alloying elemental Fe and Co powders using a high-energy ball mill. The microstructural evolution was studied as a function of milling time and subsequent annealing using X-ray diffractometry and differential scanning calorimetry. The magnetic behavior of the specimens was characterized using a vibrating sample magnetometer and a magnetic force microscope. A reduction in grain size coupled with an increase in coercivity was observed as function of milling time. The smallest grain size of 4 nm, which exhibited a coercivity of 122 Oe and magnetization of 2 T at room temperature, was obtained after 240 h of milling. The reduction in grain size during milling was not accompanied by enhanced soft magnetic properties.

Pulsed magnetic field magnetic force microscope and evaluation of magnetic properties of soft magnetic tips

2015 ◽  
Vol 48 (33) ◽  
pp. 335006 ◽  
Author(s):  
Yangdong Zheng ◽  
Satoru Yoshimura ◽  
Genta Egawa ◽  
Fu Zheng ◽  
Yukinori Kinoshita ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Magnetic Force ◽  
Pulsed Magnetic Field ◽  
Magnetic Force Microscope ◽  
Soft Magnetic
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