We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.
Hardware

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

What is a Magnetic Head?

By Jason C. Chavis
Updated: May 16, 2024
Views: 10,376
Share

A magnetic head is any device used with some sort of recording technique designed to apply information to a type of physical medium such as a tape or hard disk. The concept uses electromagnetism to cause a certain material to change its orientation in a viable manner that can be interpreted by a playback resource. Traditionally, magnetic heads are used with some sort of tape coated in iron oxide. Disk drives use a similar principle, but convert the magnetism into electrical current.

For tape recorders, a type of magnetic head stays in place as the tape is run along its surface. Two designs are used for this process: a fixed or rotating head. Fixed heads are generally used for audio recording, magnetically adjusting two or more channels along the length of the tape. The rotating head is used for video technology, laying down magnetized data at an angle along the length of the tape to make use of the full surface area.

A tape-based magnetic head uses a basic structure to control the electromagnetic energy utilized to store data on the iron oxide. The magnetic material is designed in a round or square shape with a hole, allowing air or some other material to act as an insulator. As the tape passes along the magnetic head, the electromagnetic energy magnetizes the iron oxide on the tape. Utilizing a wire coil connected to the device, it can either be used as a magnetic head reader or magnetic recording head. This means that the tape can either be read for data or have data placed upon its length for storage.

With hard drives, the magnetic head is designed very differently with a vastly different purpose. The magnetic head, composed of coil-wrapped ferrite, sits above the disk's surface producing a magnetic field. This field is concentrated into an electrical current. As the disk spins, the electromagnetic reaction creates electronic data to be stored for later use. Likewise, the current is used to read back the information.

Over the years, the magnetic head of hard disk technology has gone through many changes. During the early 1990s, metal-in-gap heads were invented that used a small piece of metal placed within the ferrite to help process more condensed pieces of information. In the early 2000s, heaters were added to the construction of hard disk to allow the magnetic heads to operate with additional disk platters. The heat generated from these devices helps saturate the disk with stronger magnetism, ensuring that the information is more securely stored.

Share
EasyTechJunkie is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Discussion Comments
Share
https://www.easytechjunkie.com/what-is-a-magnetic-head.htm
Copy this link
EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.

EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.