Magnetocaloric Effect, Magnetic Interactions and Phase Transition in La1.3Fe11.6-xSi1.4Gax Alloys

被引：5

作者：

Archana, R. ^{[1
]}

Ramakrishna, V. V. ^{[2
]}

Suresh, V ^{[3
]}

Kavita, S. ^{[1
]}

Bhatt, Pramod ^{[4
,5
]}

Deepika, R. ^{[6
]}

Ramya, M. ^{[7
]}

Yusuf, S. M. ^{[4
,5
]}

Gopalan, R. ^{[1
]}

机构：

[1] Int Adv Res Ctr Powder Met & New Mat ARCI, Chennai 600113, Tamil Nadu, India

[2] Mahindra Univ, Ecole Cent Sch Engn MEC, Survey 62-1A, Hyderabad 500043, Telangana, India

[3] Vellore Inst Technol, Sch Adv Sci, Vellore 632014, Tamil Nadu, India

[4] Bhabha Atom Res Ctr, Solid State Phys Div, Mumbai 400085, Maharashtra, India

[5] Homi Bhabha Natl Inst, Mumbai 400094, Maharashtra, India

[6] PSG Coll Technol, Coimbatore 641004, Tamil Nadu, India

[7] Manipal Acad Higher Educ, Manipal Inst Technol Bengaluru, Dept Biotechnol, Manipal 576104, Karnataka, India

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2022年 / 35卷 / 09期

关键词：

Magnetocaloric effect; La-Fe-Si alloys; FE-SI COMPOUNDS; ENTROPY CHANGE; 1ST-ORDER TRANSITION; TEMPERATURE; LA(FE; LA; CE; SUBSTITUTION; BEHAVIOR; CARBON;

D O I：

10.1007/s10948-022-06295-5

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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 alpha-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.

引用

页码：2505 / 2518

页数：14

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