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Magnetic Structures in RNi2B2C (R = Ho, Er) Superconductors

Published online by Cambridge University Press:  22 February 2011

C. Stassis ,
A. I. Goldman ,
P. Dervenagas ,
J. Zarestky ,
P. C. Canfield ,
B. K. Cho ,
D. C. Johnston  and
B. Sternlieb
C. Stassis
Affiliation:
Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011
A. I. Goldman
Affiliation:
Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011
P. Dervenagas
Affiliation:
Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011
J. Zarestky
Affiliation:
Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011
P. C. Canfield
Affiliation:
Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011
B. K. Cho
Affiliation:
Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011
D. C. Johnston
Affiliation:
Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011
B. Sternlieb
Affiliation:
Physics Department, Brookhaven National Laboratory, Upton, NY 11973
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Abstract

Single crystal neutron diffraction techniques have been employed to study the evolution of magnetic structures in RNi2B2C compounds in an attempt to understand the relationship between magnetic ordering and superconductivity in several members of this series. For HoNi2B2C, below the superconducting transition (Tc = 8 K), an incommensurate magnetic structure characterized by two wave vectors (0.585 a* and 0.915 c*) is found in a narrow temperature range between 4.7 K and 6 K. This is the same temperature range where bulk measurements find a deep minimum in the upper critical field, Hc2. Below 4.7 K, HoNi2B2C is a simple collinear antiferromagnet. ErNi2B2C (Tc = 11 K) orders in an incommensurate modulated antiferromagnetic state characterized by an ordering wave vector 0.553 ā * below 7 K, which coexists with superconductivity.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 376: Symposium BB – Neutron Scattering in Materials Science , 1994 , 559
Copyright
Copyright © Materials Research Society 1995

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References

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