Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2003-09-12
Physics
Condensed Matter
Strongly Correlated Electrons
Scientific paper
Single crystals of the title compounds were grown out of an AgGe-rich ternary solution. Powder x-ray diffraction data confirmed the hexagonal AlNiZr-type structure ($P\bar{6}2m$ space group), an ordered variant of the Fe$_2$P structure type. Antiferromagnetic ordering can be inferred from magnetization, resistance and specific heat measurements, with values of T$_N$ between 28.5 K for TbAgGe, and 1.0 K for YbAgGe, which scale roughly with the de Gennes factor. Anisotropic $M(H)$ measurements indicate one or more metamagnetic transitions when the external field is applied along the c-axis (for R=Tb) or perpendicular to it (R = Ho, Er, Tm), or even in both orientations as in the case of DyAgGe. Furthermore, the extreme anisotropy of the magnetization in TmAgGe, where magnetic moments lie in the $ab$-plane, provides the possibility of studying the angular dependence of metamagnetism in hexagonal compounds with the rare earth in orthorhombic point symmetry. YbAgGe has distinct properties from the rest of the series: an enhanced electronic specific heat coefficient ($\gamma \approx$(154.2$\pm$2.5)mJ/mol*K$^2$), and apparently small moment magnetic ordering below 1.0 K. This compound appears to be close to a quantum critical point.
Bud'ko Sergey L.
Canfield Paul. C.
Lacerda A. H.
Morosan Emilia
Torikachvili Milton S.
No associations
LandOfFree
Thermodynamic and transport properties of RAgGe (R=Tb-Lu) single crystals does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Thermodynamic and transport properties of RAgGe (R=Tb-Lu) single crystals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermodynamic and transport properties of RAgGe (R=Tb-Lu) single crystals will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-230319