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Structural and cryogenic magnetic properties of RE2Ni2In (RE = Pr, Nd, Dy and Ho) compounds

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Abstract

The crystal structures, magnetic properties and magneto-caloric effects (MCEs) of RE2Ni2In (RE = Pr, Nd, Dy and Ho) compounds were investigated. The results indicate that Pr2Ni2In and Nd2Ni2In compounds have a tetragonal Mo2FeB2-type structure belonging to the P4/mbm space group and undergo a second-order paramagnetic to ferromagnetic (PM to FM) transition at a Curie temperature (TC) of 7.5 and 10.5 K, respectively, whereas Dy2Ni2In and Ho2Ni2In compounds have an orthorhombic Mn2AlB2-type structure belonging to the space group Cmmm and possess a magnetic transition from PM to antiferromagnetic (AFM) at a Néel temperature TN of 19 and 10.5 K together with a first-order field induced metamagnetic transition, respectively. Moreover, an additional magnetic transition at a lower temperature of around 5.5 K is detected for the Ho2Ni2In compound. A considerable reversible magneto-caloric effect is observed accompanying the magnetic phase transition, and the maximum values of the magnetic entropy change (−ΔSmaxM) of the present RE2Ni2In series compounds are determined to be 9.3, 11.5, 6.4 and 11.5 J kg−1 K−1 with a magnetic field change (ΔH) of up to 0–5 T for RE = Pr, Nd, Dy and Ho, respectively.

Graphical abstract: Structural and cryogenic magnetic properties of RE2Ni2In (RE = Pr, Nd, Dy and Ho) compounds

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Publication details

The article was received on 09 Aug 2019, accepted on 14 Nov 2019 and first published on 18 Nov 2019


Article type: Paper
DOI: 10.1039/C9DT03245B
Dalton Trans., 2019, Advance Article

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    Structural and cryogenic magnetic properties of RE2Ni2In (RE = Pr, Nd, Dy and Ho) compounds

    Z. Zhang, P. Wang, H. Rong and L. Li, Dalton Trans., 2019, Advance Article , DOI: 10.1039/C9DT03245B

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