Structural, Thermal and Magnetic Properties of Ga Excess Ni-Mn-Ga
نویسندگان
چکیده
منابع مشابه
Magnetic properties of (Ga,Mn)As
The discovery of carrier-mediated ferromagnetism in (III,Mn)V and (II,Mn)VI dilute magnetic semiconductors (DMS) grown by molecular beam epitaxy makes it possible to examine the interplay between physical properties of semiconductor quantum structures and ferromagnetic materials [1]. (Ga,Mn)As serves as a valuable test ground for ferro-DMS, due to the relatively high Curie temperature, TC, and ...
متن کاملMAGNETIC AND MAGNETO-MECHANICAL PROPERTIES OF Ni-Mn-Ga MAGNETIC SHAPE MEMORY ALLOYS
OF DOCTORAL DISSERTATION HELSINKI UNIVERSITY OF TECHNOLOGY P. O. BOX 1000, FI-02015 TKK http://www.tkk.fi Author Ladislav Straka Name of the dissertation Manuscript submitted 6.2.2007 Manuscript revised 22.5.2007 Date of the defence 15.6.2007 Article dissertation (summary + original articles) Monograph Department Laboratory Field of research Opponent(s) Supervisor Instructor Abstract
متن کاملElastic constants of Ni-Mn-Ga magnetic shape memory alloys
We have measured the adiabatic second order elastic constants of two Ni-Mn-Ga magnetic shape memory crystals with different martensitic transition temperatures, using ultrasonic methods. The temperature dependence of the elastic constants has been followed across the ferromagnetic transition and down to the martensitic transition temperature. Within experimental errors no noticeable change in a...
متن کاملMagnetic properties and electronic structure of Mn-Ni-Ga magnetic shape memory alloys.
Influence of disorder, antisite defects, martensite transition and compositional variation on the magnetic properties and electronic structure of Mn(2)NiGa and Mn(1+x)Ni(2-x)Ga magnetic shape memory alloys have been studied by using full potential spin-polarized scalar relativistic Korringa-Kohn-Rostocker (FP-SPRKKR) method. Mn(2)NiGa is ferrimagnetic and its total spin moment increases when di...
متن کاملEffect of composition on the magnetic and elastic properties of shapememory Ni-Mn-Ga
The growing interest in ferromagnetic shape-memory Ni-Mn-Ga for implementation in actuator applications originates from the fact that this class of materials exhibits large strains when driven by a magnetic field. Large bidirectional strains up to a theoretical 6% are produced in these materials by twin boundary motion as martensite variants rotate to align respectively parallel or perpendicula...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Materials Science Forum
سال: 2009
ISSN: 1662-9752
DOI: 10.4028/www.scientific.net/msf.635.43