Crystal Structure and Magnetic Properties of the Breathing Kagome Ising Antiferromagnet Yb3Ni11Ge4.63

Mitsuru Takahashi; Kazuhiro Nawa; Daisuke Okuyama; Hiroyuki Nojiri; Matthias D. Frontzek; Maxim Avdeev; Masahiro Yoshida; Daichi Ueta; Hideki Yoshizawa; Taku J. Sato

doi:10.7566/JPSJ.89.094704

Crystal Structure and Magnetic Properties of the Breathing Kagome Ising Antiferromagnet Yb₃Ni₁₁Ge_4.63

Mitsuru Takahashi, Kazuhiro Nawa, Daisuke Okuyama, Hiroyuki Nojiri, Matthias D. Frontzek, Maxim Avdeev, Masahiro Yoshida, Daichi Ueta, Hideki Yoshizawa, Taku J. Sato

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Abstract

We have investigated magnetic properties of the rare-earth based intermetallic compound Yb₃Ni₁₁Ge_4.63 (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 Θ^a = −0.01(2) K (H ∥ a) and Θ^c = −0.67(2) K (H ∥ 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 0.8 K 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.

Original language	English
Article number	094704
Journal	Journal of the Physical Society of Japan
Volume	89
Issue number	9
DOIs	https://doi.org/10.7566/JPSJ.89.094704
Publication status	Published - 2020 Sept 15

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title = "Crystal Structure and Magnetic Properties of the Breathing Kagome Ising Antiferromagnet Yb3Ni11Ge4.63",

abstract = "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 Θa = −0.01(2) K (H ∥ a) and Θc = −0.67(2) K (H ∥ 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 0.8 K 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.",

author = "Mitsuru Takahashi and Kazuhiro Nawa and Daisuke Okuyama and Hiroyuki Nojiri and Frontzek, {Matthias D.} and Maxim Avdeev and Masahiro Yoshida and Daichi Ueta and Hideki Yoshizawa and Sato, {Taku J.}",

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doi = "10.7566/JPSJ.89.094704",

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T1 - Crystal Structure and Magnetic Properties of the Breathing Kagome Ising Antiferromagnet Yb3Ni11Ge4.63

AU - Takahashi, Mitsuru

AU - Nawa, Kazuhiro

AU - Okuyama, Daisuke

AU - Nojiri, Hiroyuki

AU - Frontzek, Matthias D.

AU - Avdeev, Maxim

AU - Yoshida, Masahiro

AU - Ueta, Daichi

AU - Yoshizawa, Hideki

AU - Sato, Taku J.

PY - 2020/9/15

Y1 - 2020/9/15

N2 - 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 Θa = −0.01(2) K (H ∥ a) and Θc = −0.67(2) K (H ∥ 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 0.8 K 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.

AB - 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 Θa = −0.01(2) K (H ∥ a) and Θc = −0.67(2) K (H ∥ 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 0.8 K 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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ER -

Crystal Structure and Magnetic Properties of the Breathing Kagome Ising Antiferromagnet Yb₃Ni₁₁Ge_4.63

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