Glossary: Rare Earth Magnet

Expert Center > Glossary > Rare Earth Magnet

«Back to Glossary Menu

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0-9

Rare Earth Magnet

A type of strong, permanent magnet made from a rare earth element alloy. Rare earth elements (a.k.a. lanthanides or lanthanoids, the elements from atomic number 57 to 71) are not especially rare, being commonly found in the earth's crust, nor are they "earths," which refers to base oxides of electro-positive metals that cannot be smelted or desolved in water. They are highly conductive of electricity and highly reactive and therefore oxidize or tarnish quickly in air. The most common rare earth elements used in magnets include neodymium (actually an alloy of neodymium, iron, and boron) and an alloy of samarium and cobalt.

Neodymium is the less expensive of the two common types and is the strongest permanent magnet type known. In the music/pro audio world, it is typically used in hard drives, speaker drivers, dynamic microphones, and headphone drivers.
Samarium-cobalt is more resistant to oxidation and high temperatures than neodymium, and is used in Fender's SCN (Samarium Cobalt Noiseless) guitar and bass pickups, as well as in high-speed motors, turbo machinery, and in systems that must function in cryogenic or high-temperature environments.

R-Buss

R-DAT

RA

Rack

Rack Ears

Rackmount

Rackmountable

Rack Panel

Rack Rail

Rack Space

Rack Tom

Radio Frequency

Radio Wave

Radius (Fingerboard)

RAID

RAID 0

RAID 1

RAID 2

RAID 3

RAID 4

RAID 5

RAID 6

RAM

RAM Disk

Random Access

Random Noise

Rank

RAR

Rare Earth Magnet

Rarefaction

Rasgueado

Rate/Level Envelope Generator

Ratio

RCA

Re-Amp

Reactive Load

Read

Read Head

RealAudio

Real Time

Reboot

Recap (or Recapping)

Receiver Image

Reconstruction Filter

Record Enable

Recording Console

Rectifier

Recursive Formula (Filter)

Recycle Bin

Red Book

Reel

Reel-to-Reel

Reen

Reference Track

Reflection

Reformat

Refraction

Refurbished

Regal

Regal

Regeneration

Region

Register

Regulator (Voltage Regulator)

Rehearsal Mark

Relap

Release

Release Trigger

Release Velocity

Relic

Relief

Reluctance

Reluctance

Remix

Remote Control

Removable Hard Drive

REMS

Render

Repeat

Repeater

Repeat Mark

Replace Edit

Repro

Reproduction Right

Res-O-Glas

Resample

Reset All Controllers

Resistance

Resistive Load

Resistor

Resolution

Resolve

Resonance

Resonant

Resonant Frequency

Resonant Head

Resonate

Resonator

Rest

Restart

Restart

Resultant Tone

Resynthesis

Retro

Retrofit

Return

Reverb

Reverb Driver

Reverb Tail

Reverb Tank

Reverse Breakdown Voltage

Reverse Engineering

Reverse Pinch

Reversion Clause

ReWire

REX File

RF

RFI

RFZ

RGB

Rhodes Electric Piano

Rhythm

RIAA

RIAA Equalization

Ribbon Cable

Ribbon Controller

Ribbon Mic

Ribbon Tweeter

Richlite(tm)

Rick-O-Sound

Ricochet

Ride Cymbal

RIFF

Rift Sawn

Right-click

Rim

Ring Modulator

Ring Out

RIP

Ripple Edit

RISC

Rise Time/Fall Time

Ritardando

Rivet

RMA

RMID

RMS (Root Mean Square)

RMS

Robert Moog

Rocket Network

Rocking Bar Bridge

RoHS

Roland Jupiter 8

Roll Mode

Rolloff

Rolloff Slope

ROM

Rompler

Room Mic

Room Reverb

Root

Root Key (Sampling)

Rosette

Rosewood

Rotary Selector Switch

Rotary Speaker

Rotating Head

Rototom

Rototom

Round Wound

Rout

Royalty-free

RPM

RS-232

RS-422

RSS

RSSI

RT60

Real Time Analyzer (RTA)

RTAS

Rubato

Rudiments

Rumble

Run Sheet

Our Customers Say...