Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 89, Issue 9, Pages -Publisher
PHYSICAL SOC JAPAN
DOI: 10.7566/JPSJ.89.094704
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Funding
- MEXT of Japan [JP15H05883, JP17K18744, JP18KK0150, JP19H01834, JP19K21839, JP19H05824]
- CORE laboratory research program dynamic alliance for open innovation bridging human, environment and materials of the network joint research center for materials and devices
- general user program for neutron scattering experiments, Institute for Solid State Physics, University of Tokyo
- US-Japan collaborative program on neutron scattering
- scientific user facilities division, office of basic energy sciences, US department of energy
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We have investigated magnetic properties of the rare-earth based intermetallic compound Yb3Ni11Ge4.63 (YNG), where Yb3+ ions form a breathing-kagome lattice. Single-site 4 f electron wavefunctions of the ground-state doublet are deduced from magnetization and heat capacity measurements. The Weiss temperatures are quite anisotropic as circle minus(a) = -0.01(2) K (H parallel to a) and circle minus(c) = -0.67(2) K (H parallel to c), indicating Ising-like spin-spin interactions dominating in this compound. Low-temperature neutron diffraction confirms absence of magnetic Bragg peaks down to 0.05 K, whereas enhancement of broad peaks below 0.8K was observed, a signature of short-range spin correlations. Competing interactions on the breathing-kagome lattice would suppress a magnetic long-range order in YNG.
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