Magnetic Properties and Critical Currents of the Dy0.8Er0.2Rh3.8Ru0.2B4 and Dy0.6Er0.4Rh3.8Ru0.2B4 Superconductors

S. A. Lachenkov; Лаченков С. А.; V. A. Vlasenko; Власенко В. А.; A. Yu. Tsvetkov; Цветков А. Ю.; V. A. Dement’ev; Дементьев В. А.

doi:10.31857/S0002337X2301013X

Magnetic Properties and Critical Currents of the Dy0.8Er0.2Rh3.8Ru0.2B4 and Dy0.6Er0.4Rh3.8Ru0.2B4 Superconductors

Autores: Lachenkov S.A.¹, Vlasenko V.A.², Tsvetkov A.Y.², Dement’ev V.A.¹
Afiliações:
1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, 119991, Moscow, Russia
2. Lebedev Institute of Physics, Russian Academy of Sciences, 119991, Moscow, Russia
Edição: Volume 59, Nº 1 (2023)
Páginas: 39-45
Seção: Articles
URL: https://kld-journal.fedlab.ru/0002-337X/article/view/668389
DOI: https://doi.org/10.31857/S0002337X2301013X
EDN: https://elibrary.ru/OTKSTX
ID: 668389

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Resumo

The magnetic superconductors Dy0.8Er0.2Rh3.8Ru0.2B4 (Tc ~ 5.1 K) and Dy0.6Er0.4Rh3.8Ru0.2B4 (Tc ~ 5.8 K) have been prepared by partially substituting Er for Dy in DyRh3.8Ru0.2B4, and their χ(Т), М(B), and
(Т) have been studied in detail. The materials have been shown to undergo an antiferromagnetic transition (at ~3 K) similar to that of the magnetic superconductor DyRh3.8Ru0.2B4. Using magnetic moment vs. magnetic field, M(B), measurements for Dy0.8Er0.2Rh3.8Ru0.2B4 and Dy0.6Er0.4Rh3.8Ru0.2B4 samples and the Bean model, we have obtained the critical current density as a function of field, jc(B), and the reduced pinning force as a function of reduced field, Fp(h), for the Er-containing materials. The superconductors with antiferromagnetic order in their magnetic subsystem (Dy0.8Er0.2Rh3.8Ru0.2B4 and Dy0.6Er0.4Rh3.8Ru0.2B4) have been shown to exhibit the largest deviation from the scaling law for h > 0.4.

Palavras-chave

superconductivity, magnetic superconductors, magnetic properties, antiferromagnetism, ferrimagnetism, critical currents, Bean model, pinning force, pinning centers, scaling law

Bibliografia

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