Article (Scientific journals)
Magnetic ordering of the martensite phase in Ni-Co-Mn-Sn-based ferromagnetic shape memory alloys
Sarkar, Sudip Kumar; Ahlawat, Sarita; Kaushik, S. D. et al.
2019In Journal of Physics: Condensed Matter
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Keywords :
Condensed Matter - Materials Science
Abstract :
[en] The magnetic state of low temperature martensite phase in Co-substituted Ni-Mn-Sn-based ferromagnetic shape memory alloys (FSMAs) has been investigated, in view of numerous conflicting reports of occurrences of spin glass (SG), superparamagnetism (SPM) or long range anti- ferromagnetic (AF) ordering. Combination of dc magnetization, ac susceptibility and small angle neutron scattering (SANS) studies provide a clear evidence for AF order in martensitic phase of Ni45Co5Mn38Sn12 alloy and rule out SPM and SG orders. Identical studies on another alloy of close composition of Ni44Co6Mn40Sn10 point to presence of SG order in martensitic phase and absence of SPM behavior, contrary to earlier report. SANS results do show presence of nanometre-sized clusters but they are found to grow in size from 3 nm at 30 K to 11 nm at 300 K, and do not correlate with magnetism in these alloys. <P />
Disciplines :
Physics
Author, co-author :
Sarkar, Sudip Kumar
Ahlawat, Sarita
Kaushik, S. D.
Babu, P. D.
Sen, Debasis
Honecker, Dirk ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Biswas, Aniruddha
External co-authors :
yes
Language :
English
Title :
Magnetic ordering of the martensite phase in Ni-Co-Mn-Sn-based ferromagnetic shape memory alloys
Publication date :
01 August 2019
Journal title :
Journal of Physics: Condensed Matter
ISSN :
1361-648X
Publisher :
Institute of Physics Publishing, Bristol, United Kingdom
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Physics and Materials Science
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since 13 January 2020

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