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Neutron Powder Diffraction Refinement of the Nuclear and Magnetic Structures of HoNi2B2C at R.T., 10, 5.1 AND 2.2 K

Published online by Cambridge University Press:  22 February 2011

Q. Huang ,
A. Santoro ,
T.E. Grigereit ,
J.W. Lynn ,
R.J. Cava ,
J.J. Krajewski  and
W.F. Peck Jr.
Q. Huang
Affiliation:
Reactor Radiation Division, National Institute of Standards and Technology, Gaithersburg, MD 20899 Center for Superconductivity Research, University of Maryland, College Park, MD 20742
A. Santoro
Affiliation:
Reactor Radiation Division, National Institute of Standards and Technology, Gaithersburg, MD 20899
T.E. Grigereit
Affiliation:
Reactor Radiation Division, National Institute of Standards and Technology, Gaithersburg, MD 20899 Center for Superconductivity Research, University of Maryland, College Park, MD 20742
J.W. Lynn
Affiliation:
Reactor Radiation Division, National Institute of Standards and Technology, Gaithersburg, MD 20899 Center for Superconductivity Research, University of Maryland, College Park, MD 20742
R.J. Cava
Affiliation:
AT&T Bell Laboratories, Murray Hill, NJ 07974
J.J. Krajewski
Affiliation:
AT&T Bell Laboratories, Murray Hill, NJ 07974
W.F. Peck Jr.
Affiliation:
AT&T Bell Laboratories, Murray Hill, NJ 07974
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Abstract

The nuclear and magnetic structures of HoNi2B2C have been investigated by neutron powder diffraction at room temperature and at 10, 5.1 and 2.2K. The compound crystallizes with the symmetry of space group 14/mmm and has room temperature lattice parameters a=3.5170(1) and c=10.5217(3) Å. No phase transitions of the nuclear structure have been observed in the range of temperatures examined. Magnetic peaks begin to appear at about 8K. The magnetic structure is the superposition of two configurations, one in which ferromagnetic sheets of holmium spins parallel to the a-b plane are coupled antiferromagnetically along the c-axis, and another in which the ferromagnetic planes are rotated away from the antiparallel configuration to give an incommensurate helicoidal structure with a period approximately equal to twelve times the length of the c-axis. The helicoidal structure competes with superconductivity while the antiferromagnetism coexists with it.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 376: Symposium BB – Neutron Scattering in Materials Science , 1994 , 553
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

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