Effect of crystal structure on magnetic-field-induced strain in Ni-Mn-Ga

Alexei Sozinov; Alexander Anatolyevich Likhachev; Nataliya Lanska; Outi Soderberg; Kari Ullakko; Veikko K. Lindroos

doi:10.1117/12.484353

13 August 2003 Effect of crystal structure on magnetic-field-induced strain in Ni-Mn-Ga

Alexei Sozinov, Alexander Anatolyevich Likhachev, Nataliya Lanska, Outi Soderberg, Kari Ullakko, Veikko K. Lindroos

Proceedings Volume 5053, Smart Structures and Materials 2003: Active Materials: Behavior and Mechanics; (2003) https://doi.org/10.1117/12.484353
Event: Smart Structures and Materials, 2003, San Diego, California, United States

Abstract

Magnetic shape memory materials are expected to have a high potential in practical applications. Several ferromagnetic materials exhibiting the large magnetic-field-induced strain have been found in recent years. The largest field-induced strain is observed in Ni-Mn-Ga system. The most important experimental results on crystal structure, magnetic anisotropy and twinning stress of martensitic phases in Ni-Mn-Ga having tetragonal five-layered, orthorhombic seven-layered and tetragonal non-layered crystal structures are reported. Depending on the martensite crystal structure Ni-Mn-Ga alloys are able to show a really giant strain response (approximately 6% in tetragonal five-layered or 10% in orthorhombic seven-layered martensitic phase) in a magnetic field less than 1 T. Contrary to these two phases, a detectable field-induced strain is not observed in non-layered tetragonal martensitic phase in Ni-Mn-Ga system. Effect of crystal structure is in a good agreement with calculation of the magnetic-field-induced strain based on the model developed by authors. The effect of composition on appearance of undesirable non-layered tetragonal martensitic phase in Ni-Mn-Ga system is discussed based on the new experimental results.

Citation Download Citation

Alexei Sozinov, Alexander Anatolyevich Likhachev, Nataliya Lanska, Outi Soderberg, Kari Ullakko, and Veikko K. Lindroos "Effect of crystal structure on magnetic-field-induced strain in Ni-Mn-Ga", Proc. SPIE 5053, Smart Structures and Materials 2003: Active Materials: Behavior and Mechanics, (13 August 2003); https://doi.org/10.1117/12.484353

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available