Rare earth magnetic order in RNi{sub 2}B{sub 2}C and RNiBC

Technical Report · Sun Jul 05 04:00:00 EDT 1998

DOI:https://doi.org/10.2172/663578· OSTI ID:663578

Skanthakumar, S ^[1]; Lynn, J W ^[2]

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1. Argonne National Lab., IL (United States). Chemistry Div.
2. National Inst. of Standards, Gaithersburg, MD (United States). Center for Neutron Research

A review of neutron diffraction experiments on the magnetic order in the RNi{sub 2}B{sub 2}C and RNiBC (R-rare earth) systems is given. The RNi{sub 2}B{sub 2}C materials exhibit a wide variety of commensurate and incommensurate magnetic structures for different rare earths, along with superconductivity that is coupled to the magnetism. Simple commensurate antiferromagnetic structures are observed for R = Pr (T{sub N} = 4.0 K), Nd (T{sub N} = 4.8 K), Ho (T{sub N} = 8.5 K) and Dy (T{sub N} = 4.8 K). In addition, HoNi{sub 2}B{sub 2}C exhibits a c-axis spiral and an a-axis modulated incommensurate structure above 5 K, while both structures collapse in favor of the commensurate structure at low T. A transversely polarized spin density wave (SDW) type incommensurate structure is observed for Er (T{sub N} = 6.8 K) and Tm (T{sub N} = 1.5 K), while a longitudinally polarized SDW structure is observed for Tb (T{sub N} = 15 K). No magnetic ordering of any type is detected for Y, Ce and Yb. HoNiBC is an antiferromagnet (T{sub N} = 9.8 K), ErNiBC is a ferromagnetic (T{sub C} = 4.6 K), while TbNiBC and DyNiBC exhibit both ferromagnetic and antiferromagnetic ordering at 17 K and {approximately} 13 K, respectively.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 663578
• Report Number(s): ANL/CHM/CP--95915; CONF-980745--; ON: DE98057944
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIFERROMAGNETISM
BORON COMPOUNDS
CARBIDES
EXPERIMENTAL DATA
FERROMAGNETISM
MAGNETIC PROPERTIES
NEUTRON DIFFRACTION
NICKEL COMPOUNDS
RARE EARTH COMPOUNDS
SUPERCONDUCTIVITY