Saturated Magnetization in Sm and Tb Doped La(Fe0.88Si0.12)13

• Main Authors: Vuong, Van Hiep, Do, Thi Kim Anh, Ngac, An Bang, Hoang, Nam Nhat, Huynh, Dang Chinh
• Other Authors: VNU Journal of Science: Mathematics – Physics
• Format: Article
• Language: English
• Published: H. : ĐHQGHN 2019
• Subjects: Magnetic; Alloys; LaFe13; Phase transition; Rare-earth
• Online Access: http://repository.vnu.edu.vn/handle/VNU_123/64758; https//doi.org/ 10.25073/2588-1124/vnumap.4353
• Institution: Vietnam National University, Hanoi

The saturated magnetization in 20% substituted La0.8R0.2(Fe0.88Si0.12)13 (R = Sm, Tb) magneto-caloric alloys is discussed in this work. The measurements were taken up to 70 kOe (7 Tesla) to detect the saturation of magnetic moments. As reported recently [Mat. Trans. 59(7) (2018) 1068], these compounds show a large variation of magnetic entropies at low field variation (~ 1.5 T), which associate with the large relative cooling efficiency (RCP) of 52 (for Tb-doped) and 102 J/kg (for Sm-doped) even at low effective DH of ~ 15 kOe. We re-detected the effective range of field variation DH and recognized that the effective DH ~ 5 kOe which is much lower than the value of other magneto-caloric compounds and is excellent for application of Sm-doped compound in modern cooling devices.