Details

Autor(en) / Beteiligte

• Chakraborty, Sudip
• Gupta, Shuvankar
• Pakhira, Santanu
• Dan, Shovan
• Biswas, Anis
• Mudryk, Yaroslav
• Mazumdar, Chandan

Titel

Large adiabatic temperature change and magnetic frustration in triangular lattice antiferromagnet Dy2IrSi3

Ist Teil von

• Journal of alloys and compounds, 2024-04, Vol.981, p.173652, Article 173652

Ort / Verlag

United States: Elsevier B.V

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• While previous studies reveal that the formation of polycrystalline R2TX3 (R = rare-earth, T = transition metal, X = p-block element) type compounds with T = Ir and Co is not achievable without deliberate introduction of atomic vacancies of Ir/Co and Si, we report successful synthesis of Dy2IrSi3 with fully stoichiometric ratio of constituent elements. An antiferromagnetic transition is manifested in the compound at 6.6 K where only about 50 % of Dy spins take part, while the rest remain in highly frustrated state due to edge-sharing triangular lattice geometry. The magnetic frustration is conclusively probed through magnetization, heat capacity and magnetocaloric study and the frustration parameter (f = ∣θp∣/TN, θp, TN being Curie-Weiss and Néel temperatures, respectively) in this case is as large as ∼ 3. An additional cluster-glass type transition at ∼2.8 K observed in this system has likely been originated due to this magnetic frustration. The magnetocaloric effect reveals an adiabatic temperature change of ∼7.5 K for 70 kOe magnetic field, which is one of the largest values reported in intermetallic compounds. •Successful synthesis of a new edge-sharing triangular lattice compound Dy2IrSi3.•Magnetic susceptibility along with heat capacity confirms an antiferromagnetic transition around T ∼ 6.6 K and presence of magnetic frustration.•Heat capacity experiment reveals only 50 % of Dy-spins take part in the magnetic ordering process.•Despite such magnetic frustration the compound exhibits a large adiabatic temperature change (ΔTad) at Neel temperature.•Such observation of large ΔTad is very rare for intermetallic compounds.