Giant magnetic coercivity in CaCu5-type SmNi3TSi (T=Mn–Cu) solid solutions

Giant magnetic coercivity in CaCu5-type SmNi3TSi (T=Mn–Cu) solid solutions
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CaCu5 型 SmNi3TSi (T=Mn−Cu) 固溶体中的巨磁矫顽力

DOI:
10.1016/j.jssc.2015.09.024
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发表时间:
2015-12
影响因子:
3.3
通讯作者:
A. V. Morozkin
A. V. Morozkin
中科院分区:
化学3区
文献类型:
--
作者:
Jinlei Yao;Xu Yan;A. V. Morozkin

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研究了过渡金属取代Ni对CaCu_5型SmNi_3 TSi(T=Mn,Fe,Co,Cu)固溶体磁性能的影响。SmNi 3 MnSi、SmNi 3FeSi、SmNi 3CoSi和SmNi 3CuSi分别在125 K、190 K、46 K和12 K呈现铁磁有序,在65 K、110 K、30 K和6 K呈现场致相变。根据等温磁熵变(ΔSm)计算了SmNi 3 TSi(T=Mn,Fe,Co,Cu)的磁热效应。SmNi 3 MnSi在130 K时的磁熵Δ Sm为−1.1 J/kg K,SmNi 3FeSi在180 K时为−0.4 J/kg K,SmNi 3CoSi在45 K时为−0.37 J/kg K,SmNi 3CuSi在12 K时为−0.5 J/kg K。在类变磁转变温度附近,磁场变化为0-50 kOe时,SmNi 3 MnSi在30 K时的Δ Sm为+2.4 J/kg K,SmNi 3FeSi在65 K时为−2.6 J/kg K,SmNi 3CoSi在15 K时为+0.73 J/kg K,SmNi 3CuSi在6 K时为−0.5 J/kg K。在低于场致相变温度时,SmNi 3 TSi(T=Mn,Fe,Co,Cu)的磁电阻率分别为:SmNi 3 MnSi在20 K时为80 kOe,SmNi 3FeSi在40 K时为87 kOe,SmNi 3CoSi在20 K时为27 kOe,SmNi 3CuSi在5 K时为54 kOe。
The effects of transition metal substitution for Ni on the magnetic properties of the CaCu5-type SmNi3TSi (T=Mn, Fe, Co, Cu) solid solutions have been investigated. SmNi3MnSi, SmNi3FeSi, SmNi3CoSi and SmNi3CuSi show ferromagnetic ordering at 125 K, 190 K, 46 K and 12 K and field induced transitions at 65 K, 110 K, 30 K and 6 K, respectively. The magnetocaloric effects of SmNi3TSi (T=Mn, Fe, Co, Cu) were calculated in terms of isothermal magnetic entropy change (ΔSm). The magnetic entropy ΔSmreaches value of −1.1 J/kg K at 130 K for SmNi3MnSi, −0.4 J/kg K at 180 K for SmNi3FeSi, −0.37 J/kg K at 45 K for SmNi3CoSi and −0.5 J/kg K at 12 K for SmNi3CuSi in field change of 0–50 kOe around the ferromagnetic ordering temperature. They show positive ΔSmof +2.4 J/kg K at 30 K for SmNi3MnSi, −2.6 J/kg K at 65 K for SmNi3FeSi, +0.73 J/kg K at 15 K for SmNi3CoSi and −0.5 J/kg K at 6 K for SmNi3CuSi in field change of 0–50 kOe around the metamagnetic-like transition temperature. Below the field induced transition temperature, SmNi3TSi (T=Mn, Fe, Co, Cu) exhibits giant magnetic coercivity of 80 kOe at 20 K for SmNi3MnSi, 87 kOe at 40 K for SmNi3FeSi, 27 kOe at 20 K for SmNi3CoSi and 54 kOe at 5 K for SmNi3CuSi.
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发表时间: 2004-05-01
影响因子: 3.2
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