Superconductivity and Magnetism of Dy_{1-x}Y_xRh_4B_4: Candidate for Spin-Triplet Cooper Pairing

• Authors: V. Dmitriev , A. Zaleski , E. Khlybov , L. Rybaltchenko , E. Khristenko , L. Ishchenko , A. Terekhov
• Languages of publication: EN

Abstracts

EN

In this work for the first time we give the evidence that compound Dy_{1-x}Y_x Rh_4B_4 with the tetragonal body-centered crystal structure LuRu_4B_4 is the ferrimagnetic at temperatures T_{Cur}<40 K, ferrimagnetic superconductor at T_C <10 K and antiferromagnetic superconductor at T_N <3 K. No reentrant behavior was found down to T = 0.32 K. For the first time by means of a method of microcontact spectroscopy of the Andreev reflection in point contact Ag-Dy_{0.8}Y_{0.2}Rh_4B_4 the value and temperature and field dependences of superconducting gap parameter∆(T, H) in Dy_{0.8}Y_{0.2}Rh_4B_4 were determined. The value of the ratio 2∆(0)/kT_C is about 4. Some unusual features of∆(T, H) dependences were observed, which give the evidence that the Dy_{1-x}Y_xRh_4B_4 is a candidate for spin-triplet Cooper pairing of charges with the parallel spins.

Keywords

EN

74.70.Ad

Discipline

• 74.70.Ad: Metals; alloys and binary compounds (including A15, MgB2, etc.)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 1
• Pages: 83-90

Dates

published

2008-07

received

2007-11-06

Contributors

author

V. Dmitriev

• International Laboratory of High Magnetic Fields and Low Temperatures, Wrocław, Poland
• B. Verkin Institute for Low Temperature Physics and Engin., of the NAS of Ukraine, Kharkov, Ukraine

author

A. Zaleski

• Institute of Low Temperature and Structure Research, PAS, Wrocław, Poland

author

E. Khlybov

• International Laboratory of High Magnetic Fields and Low Temperatures, Wrocław, Poland
• Institute for High Pressure Physics, RAS, Troitsk, Russia

author

L. Rybaltchenko

• B. Verkin Institute for Low Temperature Physics and Engin., of the NAS of Ukraine, Kharkov, Ukraine

author

E. Khristenko

• B. Verkin Institute for Low Temperature Physics and Engin., of the NAS of Ukraine, Kharkov, Ukraine

author

L. Ishchenko

• B. Verkin Institute for Low Temperature Physics and Engin., of the NAS of Ukraine, Kharkov, Ukraine

author

A. Terekhov

• B. Verkin Institute for Low Temperature Physics and Engin., of the NAS of Ukraine, Kharkov, Ukraine

References

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Identifiers

DOI

10.12693/APhysPolA.114.83