skip to main content

SciTech ConnectSciTech Connect

Title: Investigations on the electronic, structural, magnetic properties related to shape-memory behavior in Ti{sub 2}CoX (X=Al, Ga, In)

Highlights: • The analysis of phase stability trend is studied for Ti{sub 2}CoX(X = Al, Ga, In). • Ti{sub 2}CoGa is more suitable as shape memory alloy. • Total magnetic moments disappear with a increase of c/a ratio for all systems. • Density of states at the Fermi level are also shown. - Abstract: Using the full-potential local orbital minimum-basis method, we have performed a systematic investigations on the electronic, structural, and magnetic properties related to shape memory applications for Ti{sub 2}CoX (X=Al, Ga, In) alloys. Our results confirm that these alloys are half-metallic ferromagnets with total magnetic moment of 2μ{sub B} per formula unit in austenite phase, and undergo a martensitic transformation at low temperatures. The relative stabilities of the martensitic phases differ considerably between Ti{sub 2}CoX (X=Al, Ga, In). Details of the electronic structures suggest that the differences in hybridizations between the magnetic components are responsible for trends of phase. Quantitative estimates for the energetics and the magnetizations indicate that Ti{sub 2}CoGa is a promising candidate for shape memory applications.
Authors:
 [1] ; ; ;  [1] ;  [2] ;  [3]
  1. The School of Mathematics and Physics, Lanzhou Jiaotong University, Lanzhou 730070 (China)
  2. Department of Physics, LanZhou University, Lanzhou 730000 (China)
  3. Department of Physics, Tianshui Normal University, Tianshui 741000 (China)
Publication Date:
OSTI Identifier:
22420816
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 62; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM ALLOYS; AUSTENITE; COBALT ALLOYS; DENSITY OF STATES; ELECTRONIC STRUCTURE; FERMI LEVEL; GALLIUM ALLOYS; INDIUM ALLOYS; INTERMETALLIC COMPOUNDS; MAGNETIC MATERIALS; MAGNETIC MOMENTS; MAGNETIC PROPERTIES; MAGNETIZATION; MARTENSITIC STEELS; PHASE STABILITY; PHASE TRANSFORMATIONS; SHAPE MEMORY EFFECT; TITANIUM ALLOYS