TY - JOUR
T1 - Magnetocaloric Effect, Magnetic Interactions and Phase Transition in La1.3Fe11.6-xSi1.4Gax Alloys
AU - Archana, R.
AU - Ramakrishna, V. V.
AU - Suresh, V.
AU - Kavita, S.
AU - Bhatt, Pramod
AU - Deepika, R.
AU - Ramya, M.
AU - Yusuf, S. M.
AU - Gopalan, R.
N1 - Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
PY - 2022
Y1 - 2022
N2 - La1.3Fe11.6-xSi1.4Gax (x = 0.1, 0.3, 0.5) alloys were prepared by arc-melting. Structural studies show the presence of 1:13 as the main phase and α-Fe and La-Si as secondary phases. Increase in the Ga concentration leads to increase in the secondary phases. Thermomagnetic studies show that Curie temperature increases from 188 to 219 K with Ga content. Arrott plots show that with the increase in Ga content, the order of phase transition changes from first order to second order. The magnetic entropy change was found to be 12.3 J/kg-K, 3.05 J/kg-K and 1.35 J/kg-K under application of 1 T and increases to 21.89 J/kg-K, 13.22 J/kg-K and 6.19 J/kg-K at 7 T in La1.3Fe11.5Si1.4Ga0.1, La1.3Fe11.3Si1.4Ga0.3 and La1.3Fe11.1Si1.4Ga0.5 alloy respectively. Modified Arrott plot elucidated that the critical exponents for mean-field tricritical model explain the nature of magnetic interactions in La1.3Fe11.6-xSi1.4Gax(x = 0.3, 0.5) alloys.
AB - La1.3Fe11.6-xSi1.4Gax (x = 0.1, 0.3, 0.5) alloys were prepared by arc-melting. Structural studies show the presence of 1:13 as the main phase and α-Fe and La-Si as secondary phases. Increase in the Ga concentration leads to increase in the secondary phases. Thermomagnetic studies show that Curie temperature increases from 188 to 219 K with Ga content. Arrott plots show that with the increase in Ga content, the order of phase transition changes from first order to second order. The magnetic entropy change was found to be 12.3 J/kg-K, 3.05 J/kg-K and 1.35 J/kg-K under application of 1 T and increases to 21.89 J/kg-K, 13.22 J/kg-K and 6.19 J/kg-K at 7 T in La1.3Fe11.5Si1.4Ga0.1, La1.3Fe11.3Si1.4Ga0.3 and La1.3Fe11.1Si1.4Ga0.5 alloy respectively. Modified Arrott plot elucidated that the critical exponents for mean-field tricritical model explain the nature of magnetic interactions in La1.3Fe11.6-xSi1.4Gax(x = 0.3, 0.5) alloys.
UR - https://www.scopus.com/pages/publications/85131536606
UR - https://www.scopus.com/inward/citedby.url?scp=85131536606&partnerID=8YFLogxK
U2 - 10.1007/s10948-022-06295-5
DO - 10.1007/s10948-022-06295-5
M3 - Article
AN - SCOPUS:85131536606
SN - 1557-1939
JO - Journal of Superconductivity and Novel Magnetism
JF - Journal of Superconductivity and Novel Magnetism
ER -