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Suzhou A-one Special Alloy Co., Ltd
Suzhou A-one Special Alloy Co., Ltd
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Terfenol-D Rare Earth Giant Magnetostrictive Alloy (TbDyFe round bar) magnetostrictive

Suzhou A-one Special Alloy Co., Ltd
Suzhou A-one Special Alloy Co., Ltd
City: Suzhou
Province/State: Jiangsu
Country/Region: China
Tel: 86-0512-62518432
Contact Person:
Mr Allen Sun

Terfenol-D Rare Earth Giant Magnetostrictive Alloy (TbDyFe round bar) magnetostrictive

Place of Origin : Suzhou, China
Brand Name : AIWEN
Certification : ---
Model Number : Terfenol-D
MOQ : 100g
Price : Available per request
Packaging Details : As agreed
Delivery Time : 15 days
Payment Terms : T/T
Supply Ability : 10kg per month
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Terfenol-D Rare Earth Giant Magnetostrictive Alloy

TbDyFe round bar
Terfenol-D, an alloy of the formula TbDyFe, is a magnetostrictive material, which has the highest magnetostriction of any alloy.

Applications of Terfenol-D are found in magnetomechanical sensors, actuators, and acoustic and ultrasonic transducers, e.g. in the SoundBug device.

Size range of Terfenol-D:
Bar diameter: 2.0~50mm,length ≤250mm

Applications of Terfenol-D:

  • Micro-displacement actuator
  • Ultrasonic transducer
  • Flat panel speaker



A-one Alloy has rich experience of supplying various Terfenol-D products.

Terfenol-D has the largest room temperature magnetostriction of any known material. The name Terfenol originated from the metallic elements, Terbium (TER) and Iron (FE); and the discovering organization, Naval Ordnance Laboratory (NOL). Dysprosium (-D) was added as an alloying addition later to reduce the magnetic fields required to induce the magnetostrictive response. NOL, now known as the Naval Surface Warfare Center – Carderock Division (NSWCCD) developed Terfenol-D for high power sonar offering greater bandwidth and reliability over legacy technologies. ETREMA holds key patents and licenses for many Terfenol-D applications, including exclusive worldwide licenses to manufacture several types of Terfenol-D materials. ETREMA is the world’s leading supplier of Terfenol-D materials and products. Additionally, ETREMA provides assistance with the design and manufacturing of Terfenol-D driven products.


Terfenol-D is an alloy comprised of Terbium, Dysprosium and Iron. Terfenol-D is a solid-state material capable of converting energy from one form to another. In the case of electrical-to-mechanical conversion, the magnetostriction of the Terfenol-D generates strains 100 times greater than traditional magnetostrictives, and 2-5 times greater than traditional piezoceramics. The material has a high Curie temperature (380°C), which enables magnetostrictive performance greater than 1000 ppm from room temperature to 200°C. Adjustments in alloy composition can extend this range down to cryogenic temperatures.


As a material with multiple functions, it can be used in many different fields. Till now, more than 1000 kinds of different device have been developed, covering the fields of machine tool industry, electronic industry, oil industry, textile industry, aircraft and aerospace, agriculture as well as civil use. All these development do active advances in the regarding industry areas. For example, the use of the high power GMM transducer to treat the oil well reduces the viscosity of oil therefore increases the output of the oil greatly.

Available forms and sizes:

Round bar, diameter 4~50mm,length≤200mm

Square bar:width 2~35mm,length 2~100mm

Ring:diameter 8~50mm,thickness 2~4mm,height 2~100mm

Round plate:diameter 4~50mm,thickness≥1mm

Square plate: thickness≥1mm

Laminated round plates: diameter 10~50mm, length 5~100mm, min. laminated thickness 2mm

Powder: available per request

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