The Strongest Magnetism: Understanding the Power of Magnets
The Strongest Magnets: Fun with NdFeB Magnets!
Table of Contents
What is a Magnet?
A magnet is a special kind of rock or metal. It has a magnetic field. You can’t see it, but it’s there! This field is like an invisible force.
- It can pull some things.
- It can push some things.
This pulling and pushing is called magnetism!
The strongest kind of magnetism is called ferromagnetism. NdFeB magnets use this kind of magnetism. Things that are full of iron stick to these the best.
What are Magnetic Poles?
Every magnet has two ends. These are called poles.
- One is the North pole.
- One is the South pole.
Like poles push away from each other. North and North will not combine.
Opposite poles pull together! North and South come together easily.
Magnets also use magnetic flux density. This helps us define how strong the magnetic fields are.
We can measure the strength in a few ways!
- Gauss (unit).
- Tesla (unit).
The Strongest Magnets: NdFeB!
The strongest magnets you can find are neodymium magnets. They are also called NdFeB magnets. “NdFeB” is short for neodymium, iron, and boron. These are the things they are made of. We can say is simpler, NdFeB is:
Nd = Neodymium
Fe = Iron
B = Boron
NdFeB magnets are rare-earth magnets. This means they are made from special metals found in the earth. They are much stronger than the black magnets you might see on a fridge. They are super strong compared to the ordinary kind. They can lift a car!
Why are NdFeB Magnets So Strong?
- They have a very high magnetic force.
- They can hold their magnetism for a long time. This is named remanence.
- They are permanent magnets.
Want to make your electronics, like speakers work better? Speaker magnets made just for this can supercharge your sound!
| Magnet Type | How Strong? (MGOe) |
|---|---|
| NdFeB (we make these!) | Up to 52 |
| Other Magnets | Much Less! |
We work at a Neodymium Magnets Factory. People sometimes call it an NdFeB Magnets Factory. We make lots of these! We create both standard size, and Customized NdFeB Magnets, as well.
What Can We Do with Strong Magnets?
Strong magnets like NdFeB are used in many things!
Electric Cars
Electric cars use strong magnets in their motors. Electric Vehicles need these to help them go! NdFeB magnets help the cars go fast and far. The magnets are in a part called the electric motor, and they help make better powertrain systems.
Wind Turbines
Big wind turbines use strong magnets to make power. The wind turns the turbine, and the magnets make electricity. It has a permanent magnet synchronous generator. The generator is the part that makes the power. The wind power and wind power generation depend on magnets. They really do need a very permanent magnet. These help us use aerospace friendly solutions that use electric propulsion systems. Magnets for wind turbines and strong as can be.
Phones and Computers
Your phone and computer have NdFeB magnets inside! Small, but very important. Data storage depends on this. Mobile devices are loaded with NdFeB magnets. They make the sound in tiny headphones too using electroacoustic devices. All types of consumer electronics use these magnets!
MRI Machines
MRI machines in hospitals use strong magnets. MRI stands for magnetic resonance imaging. These magnets help doctors see inside your body. Magnets for medical uses are growing. It stands to reason that all medical devices are about to depend on these.
NdFeB magnets make the MRI machines lighter and smaller!
Toys
Even some toys use NdFeB magnets! They can make things stick together or move in fun ways. Magnetic jewelry, neodymium ball magnets, and even magnet fish are made possible by NdFeB!
More Cool Uses
- Speakers and headphones.
- Computer hard drives (magnetic storage).
- Magnetic doors.
- Magnetic tools.
- Fast trains (magnetic levitation!).
There are even uses in gardening power tools, like some of the fancier handheld tools.
Choosing the Right Magnet
There are many kinds of NdFeB magnets. Here’s how to pick the best one:
Magnet Grade
Magnets have grades, like N35, N38, N40, N42,N45, N48, N50, and N52. A bigger number means a stronger magnet!
Temperature
Some magnets get weak if they get too hot. This is called the Curie temperature. NdFeB magnets can handle heat, some better than others. H, SH, UH, and EH versions can take even more heat using magnetic anisotropy.
NdFeB magnet temperature options:
Standard Options:
Hot Conditions Options:
Very Hot Conditions Options:
Extremely Hot Conditions Options:
Unbelievably Hot Conditions Options:
Shape and Size
Magnets come in all shapes and sizes!
- Rings, like with a ring magnet
- Blocks.
- Discs.
- Balls.
- Even special shapes!
We mentioned eariler they were making strides in aerospace related matters. Well, people looking for NdFeB for the automotive industry will also need to pay attention to size and shape
Coating
NdFeB magnets can rust. A coating protects them. It can make the gold magnetic. It’s like a jacket for the magnet! Magnet Coating is very important!
- Nickel. Most often, this means 3 layers. Its is Nickel-Copper-Nickel
- Zinc.
- Gold.
- Teflon Coating, also called PTFE Coating.
Direction
Magnets have a north and south, so direction matters, specifically with:
- Magnetic circuits
- Magnetic systems
- Magnetic modules
Where Does Magnetism Come From?
It’s all about tiny things called electrons! They spin around inside the magnet. This makes a tiny magnetic field.
In most things, the electrons spin in all different ways. Their magnetic fields don’t line up.
In a magnet, the electrons spin in the same way. Their magnetic fields line up and work together. This makes a strong magnetic field! The exchange Interaction is the name for when they line up.
Many people have tried to find magnetic monopoles. This would be a magnet with only one pole. They have never succedded.
We know that magnetism and electricity are related. This is called electromagnetism. Scientists like the famous James Clerk Maxwell figured this out.
Earth’s magnetic field comes from way deep in the Earth. Hot, melted metal moves around and uses magnetic declination. This makes a magnetic field that protects us from things in space!
It’s also how a magnet compass work! It helps people find directions.
Cool Science with Magnets
Quantum magnetism is a special kind of magnetism. It happens in very, very tiny things. [^13] Quantum spin liquid is an example of this.
Magnetic nanoparticles are tiny, tiny magnets. Doctors can use them to help people! They are the size of a germ! Magnetic resonance comes back to the MRI machine.
SQUID magnetometers are the strongest magnet sensors! They can be used to watch magnetotactic bacteria.
Magnets follow Ampere’s Law and Faraday’s Law.
Safety with Strong Magnets
Strong magnets are fun, but be careful!
- Don’t put them near computers or phones. They could mess them up.
- Don’t swallow them!
- Keep them away from little kids.
- Big magnets can pinch!
In all industrial magnets applications, be safe.
We Make Magnets! We are a NdFeB Magnet Manufacturer
We said it before and we’ll say it again. We are a NdFeB magnet manufacturer.
We make the strongest magnets! We use neodymium, iron, and boron.[^14] If you need a Custom Neodymium Magnets, it’s is what we do!
We can make magnets in any shape or size! We use them for magnetic surveys, magnetotellurics, and even for magnetic bearings.
We make sure our magnets are very good. We follow all the rules. We have special papers that say we make good magnets.
We said earlier that China makes most of these. That’s true, about 80%, but new factories are opening in other countries to give buyers more options. [^16]
Recycling of Magnets: Being Kind to the Earth
It’s good to recycle magnets.[^15]
We have magnetic seperation. We try and reuse old, discarded magnets. It is good for the Earth. It is called being sustainable.
Conclusion: Magnets are Amazing!
Magnets are super cool! They are used in so many things. NdFeB magnets are the strongest kind. They help us make power, drive cars, and even see inside our bodies! Magnetic phase transitions can be complex, however, so it’s important to learn as much as you can.
Remember to be safe with strong magnets.
Do you need strong magnets? We can help! We make many different options, ready to fit your project needs.
Welcome to our factory’s custom NdFeB magnet services, where your ideas and needs become reality.
Simply share your concepts, requirements, or design drawings, and we’ll work closely with you to produce high-quality NdFeB magnets tailored to your exact specifications and performance standards.
You’ll benefit from competitive pricing, complimentary samples, and professional technical support from our dedicated team, making the customization process worry-free, safe, and cost-effective.
Our goal is to ensure that your products achieve outstanding performance with the highest level of quality and precision.
Economic Development Zone, Industrial Park, Shehong City, Sichuan Province, China.
Contact
News
US Department of Defense Allocates $5.1 Million to Recover Rare Earths from E-Waste
On January 17, 2025, the US Department of Defense announced a $5.1 million allocation to Rare Resource Recycling Inc. under the Defense Production Act.
China Revises and Implements the “Regulations for Outward Direct Investment Statistics,” Including Rare Earth Oxides
It is reported that on January 1, 2025, the Ministry of Commerce, the National Bureau of Statistics, and the State Administration of Foreign Exchange officially implemented the revised “Regulations for Outward Direct Investment Statistics.”
Canada Rare Earth Acquires Majority Stake in Laos Rare Earth Refinery
According to Magnet Materials News, on January 9, 2025, Canada Rare Earth Corp. announced plans to acquire a 70% stake in a rare earth refinery in Laos. This acquisition aims to enhance supply security and economic benefits.
