Magnetic-field-induced quadrupolar ordering and the crystal electric field effect in the distorted kagome lattice antiferromagnet 
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Ishii, Isao; Mizuno, Toshiyuki; Takezawa, Kohki; Kumano, Soichiro; Kawamoto, Yo; Suzuki, Takashi; Gorbunov, D. I.; Henriques, M. S.; Андреев, А.В.

doi:10.1103/physrevb.97.235130

Cited by 21 publications

(15 citation statements)

References 24 publications

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“…It was reported that the origin of reduced magnetic moments is likely owing to the CEF effect and competing exchange and anisotropy interactions, however, the CEF effect is unclear at present [4]. On the other hand, we previously measured the elastic moduli by using ultrasonic technique and reported that there is no characteristic softening arising from the CEF effect in Nd [12][13][14]17]. This indicates that a coupling constant of a quadrupole interaction between strains and corresponding quadrupoles is relatively small in this compound.…”

Section: Introductionmentioning

confidence: 77%

“…The R ions form a distorted kagome net in c-planes. The compounds R 3 Ru 4 Al 12 have been intriguingly studied from the viewpoint of the effect of geometrical frustration, for instance, an antiferromagnetic transition and a field-induced quadrupolar ordering in Dy 3 Ru 4 Al 12 , a helical ordering of spin trimers in Gd 3 Ru 4 Al 12 , and so on [4][5][6][7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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The Crystal Electric Field Effect in the Distorted Kagome Lattice Ferromagnet Nd₃Ru₄Al₁₂

Ishii

Mizuno

Kumano

et al. 2020

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)

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The distorted kagome lattice compound Nd 3 Ru 4 Al 12 shows a ferromagnetic phase transition at T C = 39 K. Reduced Nd magnetic moments with two different values of 2.66 and 0.95 µ B are aligned along the c-axis below T C. It was previously reported that a crystal electric field (CEF) effect may affect the reduced magnetic moments. To clarify the 4 f-electronic state in Nd 3 Ru 4 Al 12 , we performed CEF analyses for the inverse magnetic susceptibility and magnetization. We proposed the CEF level scheme of which the inverse magnetic susceptibilities along both a-and c-axes are reproduced. The ferromagnetic phase transition at T C along the c-axis can be explained by a simple CEF model. In contrast, reduced magnetic moments cannot be understood by the simple CEF model, because calculated magnetization curves are quite larger than the experimental data.

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Section: Introductionmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

The Crystal Electric Field Effect in the Distorted Kagome Lattice Ferromagnet Nd₃Ru₄Al₁₂

Ishii

Mizuno

Kumano

et al. 2020

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)

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“…The softenig is caused by an interlevel quadrupole interaciton between the ground doublet and the excited doublets, such as our previous Table I. Fitting parameters of C 44 :  (K), T C - (K), a (GPa), b (10 -5 GPa/K 2 ), and c (10 -10 GPa/K 4 [3][4][5][6]. We obtained information of the quadrupole interaction in the 4f-electronic states of the Dy 3+ ion under the hexagonal CEF from the temperature dependence of C 44 .…”

Section: Resultsmentioning

confidence: 99%

“…They show interesting physical properties, such as multipolar ordering [1,2]. Recently, we reported multipolar (quadrupolar) ordering in Dy-based compounds, DyNi 3 Ga 9 and Dy 3 Ru 4 Al 12 (magnetic-field-induced phase) [3][4][5][6]. Although 16-fold multiplet of the total angular moment in the free Dy 3+ ion splits into eight Kramers doublets with no quadrupole degeneracy under the trigonal (and hexagonal) crystal electric field (CEF), these compounds exhibit quadrupolar ordering originating from an interlevel quadrupole interaction between the ground and excited states.…”

Section: Introductionmentioning

confidence: 99%

Quadrupolar Response from the Crystal Electric Field Level Scheme Consisting of Only Kramers Doublets in DyNiAl

Suzuki

Ishii

Kumano

et al. 2020

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)

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The rare earth compound DyNiAl shows ferromagnetic and antiferromagnetic phase transitions at T C = 30 K and T 1 = 15 K, respectively. Elastic properties of DyNiAl have been investigated by means of ultrasonic spectroscopy. The transverse elastic modulus C 44 shows an elastic softening below 60 K and exhibits a bend at T C. The softening continues down to T 1 and an elastic hardening is observed below T 1. The softening above T C is well reproduced by Curie-Weiss-type equation including a quadrupole interaction. A quadrupole-quadrupole coupling constant obtained from C 44 is negative, suggesting an antiferroquadrupolar-type interaction between quadrupoles O yz or O zx .

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“…In this letter, we show that non-coplanar spin trimers can be stabilized in the intermetallic compound Dy 3 Ru 4 Al 12 , where the magnetic Dy 3+ ions constitute a breathing kagomé lattice with corner-sharing triangles of two different sizes (see Figs. 1a and b) [25,26]. Using neutron diffraction, we find that both the stacking order and the local chirality of the spin trimers can be tuned by a magnetic field.…”

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confidence: 89%

Ordering phenomena of spin trimers accompanied by a large geometrical Hall effect

et al. 2019

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The wavefuntion of conduction electrons moving in the background of a non-coplanar spin structure can gain a quantal phase -Berry phase -as if the electrons were moving in a strong fictitious magnetic field. Such an emergent magnetic field effect is approximately proportional to the solid angle subtended by the spin moments on three neighbouring spin sites, termed the scalar spin chirality. The entire spin chirality of the crystal, unless macroscopically canceled, causes the geometrical Hall effect of real-space Berry-phase origin, whereas the intrinsic anomalous Hall effect (AHE) in a conventional metallic ferromagnet is of the momentum-space Berry-phase origin induced by relativistic spin-orbit coupling (SOC). Here, we report the ordering phenomena of the spin-trimer scalar spin chirality and the consequent large geometrical Hall effect in the breathing kagomé lattice compound Dy3Ru4Al12, where the Dy 3+ moments form non-coplanar spin trimers with local spin chirality. Using neutron diffraction, we show that the local spin chirality of the spin trimers as well as its ferroic/antiferroic orders can be switched by an external magnetic field, accompanying large changes in the geometrical Hall effect. Our finding reveals that systems composed of tunable spin trimers can be a fertile field to explore large emergent electromagnetic responses arising from real-space topological magnetic orders. arXiv:1908.07728v1 [cond-mat.str-el]

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Magnetic-field-induced quadrupolar ordering and the crystal electric field effect in the distorted kagome lattice antiferromagnet Dy3Ru4Al12

Cited by 21 publications

References 24 publications

The Crystal Electric Field Effect in the Distorted Kagome Lattice Ferromagnet Nd₃Ru₄Al₁₂

The Crystal Electric Field Effect in the Distorted Kagome Lattice Ferromagnet Nd₃Ru₄Al₁₂

Quadrupolar Response from the Crystal Electric Field Level Scheme Consisting of Only Kramers Doublets in DyNiAl

Ordering phenomena of spin trimers accompanied by a large geometrical Hall effect

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Magnetic-field-induced quadrupolar ordering and the crystal electric field effect in the distorted kagome lattice antiferromagnet Dy3Ru4Al12

Cited by 21 publications

References 24 publications

The Crystal Electric Field Effect in the Distorted Kagome Lattice Ferromagnet Nd3Ru4Al12

The Crystal Electric Field Effect in the Distorted Kagome Lattice Ferromagnet Nd3Ru4Al12

Quadrupolar Response from the Crystal Electric Field Level Scheme Consisting of Only Kramers Doublets in DyNiAl

Ordering phenomena of spin trimers accompanied by a large geometrical Hall effect

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The Crystal Electric Field Effect in the Distorted Kagome Lattice Ferromagnet Nd₃Ru₄Al₁₂

The Crystal Electric Field Effect in the Distorted Kagome Lattice Ferromagnet Nd₃Ru₄Al₁₂