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Scientists Create Tiny Magnetic Memory Devices That Could Change Computing

May 28, 2026 · Nature

New magnetic tunnel junctions are smaller than a virus but could make computers faster and use less power.

Scientists have made a breakthrough with super tiny magnetic devices that could change how computers work. These devices are called magnetic tunnel junctions, and they use magnetism to store information instead of regular electricity. They are so small that you would need a powerful microscope just to see one. Even though they are incredibly tiny, they can remember information perfectly and never forget it.

The way these devices work is really cool. They have two magnetic layers that are separated by a very thin wall. When both magnets point the same way, electricity can flow through easily. When the magnets point in opposite directions, the electricity has trouble getting through. This difference in electrical flow is how computers can tell the difference between a one and a zero, which is the language computers use to store all information.

These magnetic memory devices could make our computers and phones much better. They don't lose information when the power goes off, unlike regular computer memory. This means your device could start up right away without having to reload everything. Your computer could remember exactly what you were doing even if the battery died completely. Scientists think this technology could also help create smarter artificial intelligence systems that use less power.

These tiny devices are so small that millions could fit on the head of a pin.

Comprehension quiz preview

1. What are the tiny memory devices called that scientists have created?

  • AMemory tunnel joints
  • BMagnetic tunnel junctions
  • CElectric memory cells
  • DNano storage units

2. How do magnetic tunnel junctions store information?

  • ABy changing temperature
  • BBy using different colors
  • CBy controlling how electricity flows through magnetic layers
  • DBy storing light patterns

3. What happens to the information in magnetic memory devices when the power is turned off?

  • AIt gets deleted completely
  • BIt becomes corrupted
  • CIt transfers to another device
  • DIt stays stored safely

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