| | |
| | |
Stat |
Members: 3643 Articles: 2'479'597 Articles rated: 2609
19 March 2024 |
|
| | | |
|
Article overview
| |
|
Phase transitions in Ni2+xMn1-xGa with a high Ni excess | V.V. Khovaylo
; V.D. Buchelnikov
; R. Kainuma
; V.V. Koledov
; M. Ohtsuka
; V.G. Shavrov
; T. Takagi
; S.V. Taskaev
; A.N. Vasiliev
; | Date: |
3 Nov 2005 | Journal: | Phys. Rev. B 72 (2005) 224408 | Subject: | Materials Science | Abstract: | Ferromagnetic shape memory alloys Ni$_{2+x}$Mn$_{1-x}$Ga were studied in the range of compositions $0.16 le x le 0.36$. Experimental phase diagram, constructed from differential scanning calorimetry, transport and magnetic measurements, exhibits distinctive feature in a compositional interval $0.18 le x le 0.27$, where martensitic and magnetic transitions merge in a first-order magnetostructural phase transition ferromagnetic martensite $leftrightarrow$ paramagnetic austenite. Observed in this interval of compositions a non-monotonous behavior of the magnetostructural phase transition temperature was ascribed to the difference in the exchange interactions of martensitic and austenitic phase and to the competition between increasing number of valence electron and progressive dilution of the magnetic subsystem which occur in the presence of a strong magnetoelastic interaction. Based on the experimental phase diagram, the difference between Curie temperature of martensite $T_C^M$ and Curie temperature of austenite $T_C^A$ was estimated. Influence of volume magnetostriction was considered in theoretical modeling in order to account for the existence of the magnetostructural phase transition over a wide range of compositions. | Source: | arXiv, cond-mat/0511086 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser claudebot
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |