Magnetic Properties in Tetragonal Antiferromagnet CeCoSi

Tanida, Hiroshi; Mitsumoto, Keisuke; Muro, Yuji; Fukuhara, Tadashi; Kawamura, Yukihiro; Kondo, Akihiro; Kindo, Koichi; Matsumoto, Yuji; Namiki, Takahiro; Kuwai, Tomohiko; Matsumura, T.

doi:10.7566/jpscp.30.011156

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019) 2020

DOI: 10.7566/jpscp.30.011156

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Magnetic Properties in Tetragonal Antiferromagnet CeCoSi

Hiroshi Tanida

Keisuke Mitsumoto

Yuji Muro

et al.

Abstract: We examined La-substitution and magnetic field effects on CeCoSi by means of the electrical resistivity. Although the antiferromagnetic (AFM) transition temperature (T N) is suppressed by the La substitution, the upper critical field of the AFM ordered state is not so much suppressed as expected from a suppression of T N. Together with the local configuration of Ce sites, exchange interactions among 3rd neighboring Ce sites are essential to form the long-range ordering.

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Cited by 6 publications

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NQR and NMR spectra in the odd-parity multipole material CeCoSi

Yatsushiro

Hayami

2020

Phys. Rev. B

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We theoretically study NQR and NMR spectra in the presence of odd-parity multipoles originating from staggered antiferromagnetic and antiferroquadrupole orderings. For the f-electron metal, CeCoSi, which is a candidate hosting odd-parity multipoles, we derive an effective hyperfine field acting on Co nucleus generated from electronic origin multipole moments at Ce ion under zero and nonzero magnetic fields. We elucidate that emergent odd-parity multipoles give rise to sublattice-dependent spectral splittings in NQR and NMR through the effective hyperfine coupling in the absence of the global inversion symmetry. We mainly examine behaviors of the NQR and NMR spectra in three odd-parity multipole ordered states: a y-type magnetic toroidal dipole order with a staggered x-type antiferromagnetic structure, an xy-type electric toroidal quadrupole order with a staggered x 2 − y 2-type antiferroquadrupole structure, and a z-type electric dipole order with a staggered 3z 2 − r 2type antiferroquadrupole structure. We show that different odd-parity multipole orders lead to different fielddependent spectral splittings in NMR, while only the xy-type electric toroidal quadrupole order exhibits the NQR spectral splitting. We also present possible sublattice-dependent spectral splittings for all the odd-parity multipole orders potentially activated in low-energy crystal-field levels, which will be useful to identify oddparity order parameters in CeCoSi by NQR and NMR measurements.

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NQR and NMR spectra in the odd-parity multipole material CeCoSi

Yatsushiro

Hayami

2020

Phys. Rev. B

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Nonsymmorphic Antiferromagnet LaMnSi: Single-Crystal Studies

et al. 2022

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Structural Transition in the Hidden Ordered Phase of CeCoSi

et al. 2022

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Magnetic Properties in Tetragonal Antiferromagnet CeCoSi

Cited by 6 publications

References 15 publications

NQR and NMR spectra in the odd-parity multipole material CeCoSi

NQR and NMR spectra in the odd-parity multipole material CeCoSi

Nonsymmorphic Antiferromagnet LaMnSi: Single-Crystal Studies

Structural Transition in the Hidden Ordered Phase of CeCoSi

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