Superconductivity and magnetism of complex rhodium borides
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- 作者：G. S. Burkhanov (1)
S. A. Lachenkov (1)
E. P. Khlybov (2) (3)
D. G. Dankin (1) (3)
L. F. Kulikova (2) - 刊名：Russian Metallurgy (Metally)
- 出版年：2013
- 出版时间：May 2013
- 年：2013
- 卷：2013
- 期：5
- 页码：357-361
- 全文大小：165KB
- 参考文献：1. G. S. Burkhanov, S. A. Lachenkov, and E. P. Khlybov, “Effect of magnetic subsystem on the increase in the superconductivity of ternary rhodium borides,-Dokl. Akad. Nauk 438(5), 1- (2011).
2. G. S. Burkhanov, S. A. Lachenkov, E. P. Khlybov, and L. F. Kulikova, “Effect of the magnetic subsystem of the DyRh3.8Ru0.2B4 compound on its superconducting properties,-Russian Metallurgy, No. 5, 445-49 (2012).
3. Ch. Kittel, / Introduction to Solid State Physics (Wiley, New York, 1976). - 作者单位：G. S. Burkhanov (1)
S. A. Lachenkov (1)
E. P. Khlybov (2) (3)
D. G. Dankin (1) (3)
L. F. Kulikova (2)
1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 119991, Russia
2. Vereshchagin Institute of High-Pressure Physics, Troitsk, Moscow oblast, 142190, Russia
3. International Laboratory for Strong Magnetic Fields and Low Temperatures, Gajowicka 95, Wroclaw, 53-421, Poland - ISSN：1555-6255
文摘
A number of complex rhodium borides with an LuRu4B4-type structure is synthesized; these are DyRh4B4 (samples HP) with T c ?4.5 K, DyRh3.8Ru0.2B4 (samples AM) with T c ?4.5 K, Dy0.8Er0.2Rh3.8Ru0.2B4 (samples AM) with T c ?6.3 K, and HoRh3.8Ru0.2B4 (samples AM) with T c ?6.0 K. The temperature dependence of upper critical field B c2(T) for all the samples under study exhibits an anomalous behavior. In all cases, the curve B c2(T) demonstrates a point of inflection, after which the curve deviates from the classical parabolic law abruptly upward for DyRh4B4 and DyRh3.8Ru0.2B4 (the 1st group of compounds) and downward for the Dy0.8Er0.2Rh3.8Ru0.2B4 and HoRh3.8Ru0.2B4 compounds (the 2nd group). These compounds are found to be characterized by of the following phase transitions: paramagnet ?ferrimagnet ?superconductor (retained ferrimagnetism) ?antiferromagnet (retained superconductivity). The latter transition to the antiferromagnetic state occurs only in the compounds of the 1st group. It is found that, for the DyRh3.8Ru0.2B4 compound, no traditional Meissner effect is observed but the so-called Volleben effect (paramagnetic Meissner effect) takes place.