Phase transitions and magnetocaloric effect of Ni1.7Co0.3Mn1+xAl1-x Heusler alloys
- Authors
- Kim, Yongdeok; Han, Won Bae; Kim, Hee-Soo; An, Hyeun Hwan; Yoon, Chong Seung
- Issue Date
- Apr-2013
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Magnetocaloric effect; NiCoMnAl alloy; Martensitic transformation
- Citation
- JOURNAL OF ALLOYS AND COMPOUNDS, v.557, pp.265 - 269
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ALLOYS AND COMPOUNDS
- Volume
- 557
- Start Page
- 265
- End Page
- 269
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/26756
- DOI
- 10.1016/j.jallcom.2012.12.163
- ISSN
- 0925-8388
- Abstract
- Structural and magnetic phase transitions of Ni1.7Co0.3Mn1+xAl1-x (x = 0.22-0.3) alloys were characterized to evaluate the magnetocaloric effect (MCE) of the alloys. The Curie temperature remained at similar to 360 K regardless of the composition whereas the Al fraction determined the temperature and extent of the martensitic transition. The alloy with x = 0.26 had the highest peak magnetic entropy change (vertical bar Delta S-M vertical bar(pk)) of 2.1 J kg(-1) K-1 and refrigerant capacity (RC) of 49 J kg(-1) with Delta H = 10 kOe, originating from the martensitic transformation. The vertical bar Delta S-M vertical bar(pk) and RC values were comparable to those of other Ni-Mn-X alloys. The alloy with x = 0.3 may also serve as a magnetic refrigerant near room temperature in spite of its relatively low vertical bar Delta S-M vertical bar(pk) and RC values. Our result suggests that it should be possible to fine-tune the composition of the quaternary NiCoMnAl alloy to attain optimal magnetocaloric effect near room temperature. (c) 2013 Elsevier B.V. All rights reserved.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - 서울 공과대학 > 서울 신소재공학부 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/26756)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.