Magneto-structural transition and magnetocaloric effect of Ni50-xTbxMn30Ga20 (x = 0−1) alloys. (October 2017)

• Record Type: Journal Article
• Authors: Wu, Yuye; Wang, Jingmin; Zhang, Jiang; Ma, Yonghong
• Is Part Of: Intermetallics. Volume 89(2017)
• Page Start: 100
• Page End: 104
• Publication Date: 2017-10
• Subjects: A. Functional alloys -- B. Magnetic properties -- B. Martensitic transformations; Intermetallic compounds -- Metallography -- Periodicals; Metallic glasses -- Periodicals; Composés intermétalliques -- Métallographie -- Périodiques; 669.94
• DOI: 10.1016/j.intermet.2017.05.021
• Languages: English
• ISSNs: 0966-9795

Abstract

Abstract: The magneto-structural transition, magnetic properties and magnetocaloric effect of the Ni50- x Tb x Mn30 Ga20 ( x = 0−1) alloys were studied. It was found that both the martensitic and magnetic transition temperatures were insensitive to the addition of Tb element. For the alloys with x = 0 and x = 1, the martensitic transformation and magnetic transition take place independently. For the alloys in the range of 0.1 ≤ x ≤ 0.8, coincidence of martensitic and magnetic transitions was detected, which resulted in a magneto-structural coupling transition from ferromagnetic martensite to paramagnetic austenite. The saturation magnetization of the martensite phase at 300 K marginally decreased with the addition of Tb element. Considerable and stable magnetic entropy change of approximate 6 JK −1 Kg −1 was obtained in vicinity of the magneto-structural transitions in the dual-phase alloys with 0.1 ≤ x ≤ 0.8. Graphical abstract: Highlights: The effect of Tb addition on magnetic transition behavior in Ni50- x Tb x Mn30 Ga20 ( x = 0−1) alloys is clarified. Coupled magneto-structural transition were observed in Ni50- x Tb x Mn30 Ga20 alloys with the range x = 0.1–0.8. Sizable magnetocaloric effect was monitored from the magneto-structural transition.