Patent
Mn-Ni-Sn Based Full Heusler Alloys For Low Temperature Exchange Bias Applications
Abstract
This patent is for a method of preparation of Ni-Mn based Heusler alloys that achieve never before seen levels of magnetic controllability but also temperature tolerance and tunability for the various applications at hand.
Type of IP
Faculty
Societal Impact
Spintronics plays a major role in magnetic recording as well as energy storage devices.
Salient technical features and Advantages of the Technology
- In this method samples were prepared using arc melting method followed by rapid quenching.
- A giant exchange bias effect (EB) was achieved.
- These properties are retained to temperatures as high as 70 K
- Fine tuning of the EB blocking temperature and EB field value is possible by a nominal change of Sn concentration by 0.5
- This method of preparation is easily scalable to higher amounts as required.
- All the constituents involved are relatively cheap, making this a highly economical mode of preparation.
- The properties of the alloy can be tuned for the particular specification under this method.
Technology readiness level
4
Current Status of Technology
Being currently tried for spintronic devices (like a spin valve) in a laboratory setting.
Relevant Industries
- These alloys can be used in the following kinds of devices-
- Tunnel magnetoresistance (TMR) junction devices
- Electronic spin-based magnetic heads/devices
- Giant magneto-resistance spin heads/sensor devices
- Shape-memory alloys widely utilise this material in their construction
- Spin-transfer torque magnetic random access memory (STTRAM) can be made of this material
Applications or Domain
- Tunnel magnetoresistance (TMR) junction devices
- Shape memory alloys
- Electronic spin-based magnetic heads/devices
- Giant magneto-resistance spin heads/sensor devices
- Spin-transfer torque magnetic random access memory (STTRAM)