Critical Current Density in Magnetic Dy1-xErxRh3.8Ru0.2B4 (x=0.2, 0.4) Superconductors

被引：0
|
作者：
Lachenkov, S. A. [1 ]
Vlasenko, V. A. [2 ]
Kirillova, V. M. [1 ]
Dement'ev, V. A. [1 ]
Sdobyrev, V. V. [1 ]
机构：
[1] Russian Acad Sci, Baikov Inst Met & Mat Sci, Moscow, Russia
[2] Russian Acad Sci, Lebedev Phys Inst, Moscow, Russia
来源：
RUSSIAN METALLURGY | 2023年 / 2023卷 / 03期
关键词：
superconductivity; magnetic superconductors; magnetic properties; antiferromagnetism; critical; current density; Bean model; pinning force; scaling law;
D O I：
10.1134/S0036029523030084
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The Dy0.8Er0.2Rh3.8Ru0.2B4 and Dy0.6Er0.4Rh3.8Ru0.2B4 rhodium borides with the LuRu4B4-type structure are synthesized using the DyRh3.8Ru0.2B4 compound via partial substitution of erbium (Er) for dysprosium (Dy). The dependences chi(-1)(T), M(B), and B-c2(T) of the compounds are studied. The Dy0.8Er0.2Rh3.8Ru0.2B4 and Dy0.6Er0.4Rh3.8Ru0.2B4 compounds are found to be magnetic superconductors with critical temperatures T-c approximate to 5.1 and 5.8, respectively; at T approximate to 3 K, the magnetic subsystem of the compound transfers into an antiferromagnetic state. Based on the measured field dependences of the magnetic moment (M(B)) of the Dy0.8Er0.2Rh3.8Ru0.2B4 and Dy0.6Er0.4Rh3.8Ru0.2B4 compounds, the field dependences of the critical current density jc(B) and reduced pinning force f(h) are obtained using the Bean model. The critical current density of the samples does not exceed 400 A/cm2 at T approximate to 2 K. In the case of magnetic superconductors with an antiferromagnetic order (Dy0.8Er0.2Rh3.8Ru0.2B4, Dy0.6Er0.4Rh3.8Ru0.2B4), a substantial deviation from a scaling law is observed at h > 0.4.
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页码：297 / 302
页数：6
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