Crystal growth and magnetic properties of rare earth borosilicides
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Takao Mori
Abstract
B12 icosahedra cluster-containing rare earth borosilicides REB44Si2 (RE = Tb, Dy, Ho, Er, Tm, Yb) were grown by the floating zone method and their physical properties were investigated. REB44Si2 compounds are isostructural to REB50 and they are unique among the newly discovered boron-rich phases in that it is possible to grow large crystals with dimensions exceeding 10 mm. The rare earth atoms form a coupled chain structure like a ladder along the c-axis which is also the axis along which there is a B12 icosahedral chain. Magnetic properties, resistivity, and specific heat of the compounds were investigated. The conductivity follows the 3D variable range hopping mechanism and it was determined that localization lengths ξ are extremely short, actually close to the distances of the atoms themselves. Magnetic transitions above 4 K are indicated for all the compounds except for TmB44Si2 and it is found that specific heat measurement is the expedient probe of such compounds in which the low temperature susceptibility is influenced by external conditions such as crystal growth rate. Despite dimer-like features to the magnetic transition a spin gap is not observed. The magnetic coupling in these systems is indicated to be different from the conventional mechanisms in f-electron systems of dipole-dipole coupling or RKKY interaction.
© by Oldenbourg Wissenschaftsverlag, München
Articles in the same Issue
- Editorial: Crystal Chemistry of Intermetallic Compounds
- Fritz H. Laves – 100 years young
- Fritz H. Laves – an ideal for generations
- Gustav E. R. Schulze's pioneering work on Laves phases
- Preparation, phase stability and structure of the C36 Laves phase Nb1–xCo2+x
- Atom order and thermodynamic properties of the ternary Laves phase Ti(TiyNixAl1–x–y)2
- Atomic ordering in the Laves phases L1 V(Co1–xSix)2 (x = 0.43 and 0.56)
- Microscopic structures of Laves phases and structurally related compounds: a transmission electron microscopy study
- Binary rare earth Laves phases — an overview
- Binary intermetallic phases formed by Ca, Sr, Ba, Eu and Yb: similarities and differences
- Complexity of hexagonal approximants in the RE13Zn~58 system (RE = Ce, Pr, Nd, Sm, Gd, Tb and Dy)
- Reflections on symmetry and formation of axial quasicrystals
- Mosaic-like tilings derivated from o-Co4Al13 and m-Co4Al13 crystal structures
- High-pressure crystal chemistry of binary intermetallic compounds
- Re3B type intermetallics — crystal chemistry, bonding and properties
- Ti2Rh6B – a new boride with a double perovskite-like structure containing octahedral Rh6 clusters
- On the formation and crystal structure of the Pd6B phase
- Crystal growth and magnetic properties of rare earth borosilicides
- The effect of transition metal doping on thermal conductivity of YB66
- Structure refinements of iron borides Fe2B and FeB
- Cubic structure types of rare-earth intermetallics and related compounds
- Structural variations in Gd5Si4-xSnx: size vs. electronic effects
- Tin flux synthesis of rare-earth metal silicide compounds RESi1.7 (RE = Dy, Ho): a novel ordered structure derived from the AlB2 type
- Filling the CoSn host-cell: the HfFe6Ge6-type and the related structures
- Synthesis and characterization of Na2Ba4Ga2Sb6 and Li13Ba8GaSb12
- Ge40.0Te5.3I8: synthesis, crystal structure, and properties of a new clathrate-I compound
- Ag6GeS4X2 (X: Cl, Br): surprisingly no filled Laves phases but the first representatives of a new structure type
- Low- and high-temperature structures of YbCuBi
- (La3Zx)Al and (Ce3Zx)Al with Z = C, N, O: preparation, physical properties and chemical bonding of metal-rich perovskites
- Geometric variations and electron localizations in intermetallics: PbFCl type compounds
- A novel series of sphere packings with arbitrarily low density
- Books Received
Articles in the same Issue
- Editorial: Crystal Chemistry of Intermetallic Compounds
- Fritz H. Laves – 100 years young
- Fritz H. Laves – an ideal for generations
- Gustav E. R. Schulze's pioneering work on Laves phases
- Preparation, phase stability and structure of the C36 Laves phase Nb1–xCo2+x
- Atom order and thermodynamic properties of the ternary Laves phase Ti(TiyNixAl1–x–y)2
- Atomic ordering in the Laves phases L1 V(Co1–xSix)2 (x = 0.43 and 0.56)
- Microscopic structures of Laves phases and structurally related compounds: a transmission electron microscopy study
- Binary rare earth Laves phases — an overview
- Binary intermetallic phases formed by Ca, Sr, Ba, Eu and Yb: similarities and differences
- Complexity of hexagonal approximants in the RE13Zn~58 system (RE = Ce, Pr, Nd, Sm, Gd, Tb and Dy)
- Reflections on symmetry and formation of axial quasicrystals
- Mosaic-like tilings derivated from o-Co4Al13 and m-Co4Al13 crystal structures
- High-pressure crystal chemistry of binary intermetallic compounds
- Re3B type intermetallics — crystal chemistry, bonding and properties
- Ti2Rh6B – a new boride with a double perovskite-like structure containing octahedral Rh6 clusters
- On the formation and crystal structure of the Pd6B phase
- Crystal growth and magnetic properties of rare earth borosilicides
- The effect of transition metal doping on thermal conductivity of YB66
- Structure refinements of iron borides Fe2B and FeB
- Cubic structure types of rare-earth intermetallics and related compounds
- Structural variations in Gd5Si4-xSnx: size vs. electronic effects
- Tin flux synthesis of rare-earth metal silicide compounds RESi1.7 (RE = Dy, Ho): a novel ordered structure derived from the AlB2 type
- Filling the CoSn host-cell: the HfFe6Ge6-type and the related structures
- Synthesis and characterization of Na2Ba4Ga2Sb6 and Li13Ba8GaSb12
- Ge40.0Te5.3I8: synthesis, crystal structure, and properties of a new clathrate-I compound
- Ag6GeS4X2 (X: Cl, Br): surprisingly no filled Laves phases but the first representatives of a new structure type
- Low- and high-temperature structures of YbCuBi
- (La3Zx)Al and (Ce3Zx)Al with Z = C, N, O: preparation, physical properties and chemical bonding of metal-rich perovskites
- Geometric variations and electron localizations in intermetallics: PbFCl type compounds
- A novel series of sphere packings with arbitrarily low density
- Books Received
