Unconventional critical behaviour in weak ferromagnets Fe2-xMnxCrAl (0 ≤ x < 1)
Abstract Recent investigation on weak ferromagnets Fe2-xMnxCrAl (0 ≤ x < 1) reveal the existence of a cluster glass phase (CGP) and a Griffiths-like phase (GP) below and above the ferromagnetic transition temperature (T C), respectively [(2019) Sci. Rep. 9 15888]. In this work, the influence of t...
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| Format: | Article |
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Nature Portfolio
2021-09-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-021-98377-y |
| _version_ | 1818754380884606976 |
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| author | Kavita Yadav Dheeraj Ranaut K. Mukherjee |
| author_facet | Kavita Yadav Dheeraj Ranaut K. Mukherjee |
| author_sort | Kavita Yadav |
| collection | DOAJ |
| description | Abstract Recent investigation on weak ferromagnets Fe2-xMnxCrAl (0 ≤ x < 1) reveal the existence of a cluster glass phase (CGP) and a Griffiths-like phase (GP) below and above the ferromagnetic transition temperature (T C), respectively [(2019) Sci. Rep. 9 15888]. In this work, the influence of these inhomogeneous phases on the critical behaviour (around T C) of the above-mentioned series of alloys has been investigated in detail. For the parent alloy Fe2CrAl, the critical exponent γ is estimated as ~ 1.34, which lies near to the ordered 3D Heisenberg class, whereas the obtained value of the critical exponent β ~ 0.273 does not belong to any universality class. With increment in Mn concentration, both exponents γ and β increase, where γ and β approach the disordered and ordered 3D Heisenberg class, respectively. The observed deviation of γ and unconventional value of δ can be ascribed to the increment of GP with Mn-concentration. The trend noted for β can be attributed to the increment in CGP regime with an increase in Mn-content. The estimated critical exponents are consistent and reliable as corroborated using the scaling law and equations of state. Our studies indicate that the critical phenomenon of Fe2-xMnxCrAl (0 ≤ x < 1) alloys possibly belong to a separate class, which is not described within the framework of any existing universal model. |
| first_indexed | 2024-12-18T05:22:20Z |
| format | Article |
| id | doaj.art-250f95d5a6c346a087272ba6a5604de6 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-18T05:22:20Z |
| publishDate | 2021-09-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-250f95d5a6c346a087272ba6a5604de62022-12-21T21:19:38ZengNature PortfolioScientific Reports2045-23222021-09-011111910.1038/s41598-021-98377-yUnconventional critical behaviour in weak ferromagnets Fe2-xMnxCrAl (0 ≤ x < 1)Kavita Yadav0Dheeraj Ranaut1K. Mukherjee2School of Basic Sciences, Indian Institute of TechnologySchool of Basic Sciences, Indian Institute of TechnologySchool of Basic Sciences, Indian Institute of TechnologyAbstract Recent investigation on weak ferromagnets Fe2-xMnxCrAl (0 ≤ x < 1) reveal the existence of a cluster glass phase (CGP) and a Griffiths-like phase (GP) below and above the ferromagnetic transition temperature (T C), respectively [(2019) Sci. Rep. 9 15888]. In this work, the influence of these inhomogeneous phases on the critical behaviour (around T C) of the above-mentioned series of alloys has been investigated in detail. For the parent alloy Fe2CrAl, the critical exponent γ is estimated as ~ 1.34, which lies near to the ordered 3D Heisenberg class, whereas the obtained value of the critical exponent β ~ 0.273 does not belong to any universality class. With increment in Mn concentration, both exponents γ and β increase, where γ and β approach the disordered and ordered 3D Heisenberg class, respectively. The observed deviation of γ and unconventional value of δ can be ascribed to the increment of GP with Mn-concentration. The trend noted for β can be attributed to the increment in CGP regime with an increase in Mn-content. The estimated critical exponents are consistent and reliable as corroborated using the scaling law and equations of state. Our studies indicate that the critical phenomenon of Fe2-xMnxCrAl (0 ≤ x < 1) alloys possibly belong to a separate class, which is not described within the framework of any existing universal model.https://doi.org/10.1038/s41598-021-98377-y |
| spellingShingle | Kavita Yadav Dheeraj Ranaut K. Mukherjee Unconventional critical behaviour in weak ferromagnets Fe2-xMnxCrAl (0 ≤ x < 1) Scientific Reports |
| title | Unconventional critical behaviour in weak ferromagnets Fe2-xMnxCrAl (0 ≤ x < 1) |
| title_full | Unconventional critical behaviour in weak ferromagnets Fe2-xMnxCrAl (0 ≤ x < 1) |
| title_fullStr | Unconventional critical behaviour in weak ferromagnets Fe2-xMnxCrAl (0 ≤ x < 1) |
| title_full_unstemmed | Unconventional critical behaviour in weak ferromagnets Fe2-xMnxCrAl (0 ≤ x < 1) |
| title_short | Unconventional critical behaviour in weak ferromagnets Fe2-xMnxCrAl (0 ≤ x < 1) |
| title_sort | unconventional critical behaviour in weak ferromagnets fe2 xmnxcral 0 ≤ x 1 |
| url | https://doi.org/10.1038/s41598-021-98377-y |
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