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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...
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Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows that all magnets have two poles: one is labeled north (N) and the other south (S). Magnetic poles repel if they are alike and attract if unlike. Moreover, both poles of a magnet attract unmagnetized pieces of iron.
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In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
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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.
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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.
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Updated: Feb 23, 2026

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Magneto-X Effects in Magnetic Soft Materials and Their Applications.

Ziyin Xiang1, Xiangling Xia2,3, Benjamin Ducharne4,5

  • 1YuYao Innovation Institute, Zhejiang Wanli University, Ningbo, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
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Summary
This summary is machine-generated.

Magnetic soft materials (MSMs) combine magnetic properties with soft polymers. This review covers their magneto-responsive effects, applications in robotics and medicine, and future challenges for intelligent systems.

Keywords:
flexible electronicsmagnetic soft materialsmagneto‐responsive effectssoft robotics

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Area of Science:

  • Materials Science
  • Soft Matter Physics
  • Engineering

Background:

  • Magnetic soft materials (MSMs) are advanced composites merging magnetic responsiveness with the flexibility of polymers, gels, and fluids.
  • They exhibit various magneto-responsive effects crucial for novel applications.

Purpose of the Study:

  • To systematically review fundamental magneto-responsive effects in MSMs.
  • To classify MSMs based on matrix and filler composition.
  • To highlight advancements and challenges in MSM applications.

Main Methods:

  • Literature review of magneto-responsive effects (magnetorheological, magnetoelastic, magnetothermal, etc.).
  • Classification of MSMs by material composition (matrix and filler).
  • Analysis of multidisciplinary applications and future research directions.

Main Results:

  • Detailed summary of key magneto-responsive effects in MSMs.
  • Categorization of MSMs, aiding material selection.
  • Demonstration of MSMs in soft robotics, biomedical engineering, and flexible electronics.

Conclusions:

  • MSMs offer significant potential in untethered actuation, targeted therapy, and self-powered sensing.
  • Overcoming challenges in multi-physics modeling and scalable fabrication is key.
  • Future development aims toward intelligent, integrated MSM systems.