Related Experiment Video
Updated: Mar 6, 2026
07:42
Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
Published on: July 20, 2022
3.4K
Dynamic Magnetic Alignment Boosts Remanence and Fabrication Reliability in DLP Manufacturing of Magnetic Functional
Haonan Sun1,2,3, Chengqian Zhang1,2,3, Zhezai Hu1,2,3
1State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou, China.
Advanced Materials (Deerfield Beach, Fla.)
|March 4, 2026
Summary
A new dynamic magnetic field-assisted digital light processing (DMFA-DLP) method improves magnetic soft material fabrication. This technique enhances particle alignment and material remanence, overcoming limitations of previous methods.
Area of Science:
- Materials Science
- Soft Matter Physics
- Additive Manufacturing
Background:
- Magnetic functional soft materials with embedded hard-magnetic particles offer advanced actuation and sensing capabilities.
- Existing fabrication methods like magnetic field-assisted digital light processing (MFA-DLP) face challenges such as low remanence and printing defects due to particle aggregation.
- Incomplete particle alignment in MFA-DLP leads to suboptimal material performance.
Purpose of the Study:
- To introduce a novel dynamic magnetic field-assisted digital light processing (DMFA-DLP) method to enhance the fabrication of magnetic functional soft materials.
- To overcome the limitations of aggregation and incomplete alignment in conventional MFA-DLP.
- To improve the efficiency, reliability, and performance of magnetic soft materials.
Main Methods:
- Development and implementation of a dynamic magnetic field-assisted digital light processing (DMFA-DLP) system.
- Utilizing time-varying magnetic fields to induce particle-level rotational dynamics and overcome interparticle attractions.
- Ensuring homogeneous particle dispersion before each magnetic alignment cycle.
Main Results:
- The DMFA-DLP method significantly enhances particle alignment efficiency, achieving a 212% increase in alignment ratio even with weaker magnetic fields.
- Mitigation of particle aggregation accumulation, leading to improved consistency and reduced printing defects.
- Successful fabrication of complex structures with high-resolution multi-directional magnetic patterns, including a 24-pole magnetic ring for an angle sensor.
Conclusions:
- The proposed DMFA-DLP method overcomes fundamental limitations of traditional MFA-DLP, establishing a robust platform for advanced magnetic soft material manufacturing.
- This technique enables the creation of high-performance magnetic soft materials with superior actuation and sensing properties.
- The enhanced reliability and design freedom offered by DMFA-DLP pave the way for new applications in robotics, sensors, and biomedical devices.
Related Concept Videos
01:31Ferromagnetism
3.3K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
3.3K
01:26Diamagnetism
3.1K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
3.1K
01:17Magnetic Damping
1.2K
Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
1.2K
01:24Potential Due to a Magnetized Object
847
Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
The vector...
847
01:30Paramagnetism
3.1K
Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
3.1K
01:05Atomic Nuclei: Magnetic Resonance
1.3K
The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
1.3K