Neutron-powder-diffraction study of the nuclear and magnetic structures of the antiferromagnetic superconductor HoNi2B2C

Q. Huang, A. Santoro, T. E. Grigereit, J. W. Lynn, R. J. Cava, J. J. Krajewski, W. F. Peck

Research output: Contribution to journalArticle

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Abstract

The nuclear and magnetic structures of HoNi2B2C have been investigated by neutron-powder-diffraction methods at room temperature and at 10, 5.1, and 2.2 K. The compound crystallizes with the symmetry of space group I4/mmm and lattice parameters a=3.5170(1) and c=10.5217(3) , at room temperature. The structure may be regarded as formed of (HoC) layers with the rock salt configuration alternating with (B)(Ni2)(B) blocks having a fluorite-type arrangement of the atoms. No phase transition of the nuclear structure has been observed down to a temperature of 2.2 K. Magnetic peaks begin to appear at about 8 K. 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 (magnetic space group Pm'mm'), and another in which ferromagnetic planes are rotated away from the antiparallel configuration to give an incommensurate helicoidal structure with a period approximately equal to 12 times the length of the c axis.

Original languageEnglish (US)
Pages (from-to)3701-3708
Number of pages8
JournalPhysical Review B
Volume51
Issue number6
DOIs
StatePublished - 1995
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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