Magnetic ordering of Tb3Ni8Ga and Tb3Ni6Ga2

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Journal of Solid State Chemistry Pub Date : 2025-08-28 DOI:10.1016/j.jssc.2025.125613

Sudhindra Rayaprol , Rohan Kamble , S. Quezado , S.K. Malik , Jinlei Yao , A.V. Knotko , V.O. Yapaskurt , A.V. Morozkin

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Abstract

The CeNi₃-type Tb₃Ni₈Ga and Ce₃Ni₆Si₂-type Tb₃Ni₆Ga₂ have been synthesized by arc melting under argon atmosphere followed by annealing. Tb₃Ni₈Ga is ferromagnet with T_C = 37 K accompanied by field sensitive antiferromagnetic-like transformation at lower temperature, while Tb₃Ni₆Ga₂ is field insensitive ferromagnet with T_C = 72 K. Down to 10 K it is soft ferromagnet, while Tb₃Ni₈Ga exhibits permanent magnet properties at 5 K. Around Curie temperatures, Tb₃Ni₈Ga and Tb₃Ni₆Ga₂ demonstrate an isothermal magnetic entropy change (ΔS_m^50kOe) of −8.9 J/kg⋅K and −5.7 J/kg⋅K (field change of 50 kOe), respectively. Neutron diffraction study in zero applied magnetic field shows colinear ferromagnetic ordening of Tb₃Ni₆Ga₂ (wave vector K₀ = [0, 0, 0]) below T_C and down 3 K with magnetic moment per Tb of 8.11 μ_B at 3 K.

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Tb3Ni8Ga和Tb3Ni6Ga2的磁有序

在氩气气氛下采用电弧熔炼和退火的方法合成了ceni3型Tb3Ni8Ga和ce3ni6si2型Tb3Ni6Ga2。Tb3Ni8Ga为铁磁体，TC = 37 K，低温下伴有场敏感的类反铁磁转变；Tb3Ni6Ga2为场不敏感的铁磁体，TC = 72 K。Tb3Ni8Ga在10k时表现为软铁磁，而在5k时表现为永磁体。在居里温度附近，Tb3Ni8Ga和Tb3Ni6Ga2的等温磁熵变化（ΔSm50kOe）分别为−8.9 J/kg·K和−5.7 J/kg·K（场变化为50kOe）。零外加磁场下的中子衍射研究表明，Tb3Ni6Ga2（波矢量K0 =[0,0,0]）在TC以下和3k以下共线铁磁有序，在3k处每Tb磁矩为8.11 μB。

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来源期刊

Journal of Solid State Chemistry 化学-无机化学与核化学

CiteScore

6.00

自引率

9.10%

发文量

848

审稿时长

25 days

期刊介绍： Covering major developments in the field of solid state chemistry and related areas such as ceramics and amorphous materials, the Journal of Solid State Chemistry features studies of chemical, structural, thermodynamic, electronic, magnetic, and optical properties and processes in solids.