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Transport and Magnetic Properties in the Nd Diluted System Y$_{1-x}$Nd$_{x}$Co$_{2}$Zn$_{20}$
by R. Yamamoto, Y. Shimura, K. Umeo, T. Takabatake, and T. Onimaru
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Submission summary
Authors (as registered SciPost users): | Rikako Yamamoto |
Submission information | |
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Preprint Link: | scipost_202208_00029v2 (pdf) |
Date accepted: | April 25, 2023 |
Date submitted: | Jan. 14, 2023, 1:12 p.m. |
Submitted by: | Yamamoto, Rikako |
Submitted to: | SciPost Physics Proceedings |
Proceedings issue: | International Conference on Strongly Correlated Electron Systems (SCES2022) |
Ontological classification | |
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Academic field: | Physics |
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Approach: | Experimental |
Abstract
We report the electrical resistivity, specific heat, and magnetization measurements of Y$_{1-x}$Nd$_{x}$Co$_{2}$Zn$_{20}$ for $0.017 \leq x \leq 0.95$. The Schottky-type specific heat peak at around 15 K for all the samples is reproduced by the crystalline electric field model with the $\Gamma_{6}$ doublet ground state of a Nd$^{3+}$ ion. The magnetization and magnetic susceptibility data of the samples for $x \leq 0.06$ are well reproduced by the calculation without intersite magnetic interactions among Nd moments. Therefore, the dilute Nd system Y$_{1-x}$Nd$_{x}$Co$_{2}$Zn$_{20}$ for $x \leq 0.06$ is a good candidate to study on-site interaction of the $\Gamma_{6}$ doublet ground state of 4$f$ electrons with conduction electrons.
Author comments upon resubmission
List of changes
We determined the Nd composition of each sample from the magnetization data at T = 1.8 K comparing the calculated value with the CEF parameters W = 0.89 K and X = −0.25.
The Nd composition dependence of the lattice parameter linearly increase as increasing x, and this result ensures the homogeneity of the Nd composition.
We have added a sentence as follows.
p. 2, line 47-48
The lattice parameter determined by the Rietveld analysis increases linearly with respect to x.
2. A remark on band filling effects in Co could be useful while introducing YCo2Zn20 compound as a non-magnetic analogue.
Magnetic susceptibility of YCo2Zn20 is reported to be temperature independent, yielding Pauli paramagnetism [19]. The electronic structure calculation of YCo2Zn20 suggests an intermetallic state with negligible electron-electron correlation. Thereby, the ground state becomes non-magnetic.
We have added a sentence as follows.
p. 3, line 84-85
It is noted that the band structure calculation of YCo2Zn20 suggests an intermetallic state with negligible electron-electron correlation, leading to a non-magnetic ground state [19,20].
[19] S. Jia et al., Phys. Rev. B 77, 104408 (2008).
[20] M. Cabrera-Baez et al., Phys. Rev. B 92, 214414 (2015).
3. In figure 1b inset, better to explicitly mark the X-axis label and the corresponding text in page 3 para 2 could read as '....Cm/T vs T...'.
Thank you for your suggestion. We have modified the Fig. 1b and revised the sentence.
p. 3, line 70-71
The magnetic specific heat divided by temperature as a function of temperature, Cm(T) / T vs T, is shown in the inset of Fig. 1(b).
4. Inelastic neutron scattering data are not published yet. Therefore a comparison made in page 3 discussion is fine. However, it need not be emphasized in conclusion paragraph.
We really appreciate your comment. We have revised the conclusion paragraph as follows.
p. 5, line 110-112
We have measured ρ(T), C(T), χ(T), and M(B) of Y1−xNdxCo2Zn20 for 0.017 ≤ x ≤ 0.95. The Schottky anomalies of C(T) at around 13 K are moderately reproduced with the CEF level scheme determined for NdCo2Zn20.
Published as SciPost Phys. Proc. 11, 010 (2023)