Magnetic instability induced by Rh-doping in Kondo semiconductor CeRu${}_2$Al${}_{10}$

Abstract

Magnetic ground state of Rh-doped Kondo semiconductor CeRu${}_2$Al${}_{10}$ [Ce(Ru${}_{1-x}$Rh${}_x$)${}_2$Al${}_{10}$] is investigated by muon-spin relaxation method. Muon-spin precession with two frequencies is observed in the $x$ = 0 sample, while only one frequency is present in the $x$ = 0.05 and 0.1 samples, which is attributed to the broad static field distribution at the muon site. The internal field at the muon site is enhanced from about 180 G in $x$ = 0 sample to about 800 G in the Rh-doped samples, supporting the spin-flop transition as suggested by macroscopic measurements, and the boundary of different magnetic ground states is identified around $x$ = 0.03. The drastic change of magnetic ground state by a small amount of Rh-doping (3%) indicates that the magnetic structure in CeRu${}_2$Al${}_{10}$ is not robust and can be easily tuned by external perturbations such as electron doping. The anomalous temperature dependence of internal field in CeRu${}_2$Al${}_{10}$ is suggested to be attributed to the hyperfine interaction between muons and conduction electrons.

8 pages, 8 figures, 1 table

References in corpus (5)

• Long-range order and low-energy magnetic excitations in CeRu2Al10
• Crystal-field ground state of the orthorhombic Kondo insulator CeRu2Al10
• Anisotropic spin-dynamics in the Kondo semiconductor CeRu2Al10
• Change of magnetic ground state by light electron-doping in CeOs2Al10
• Competing 4f-electron dynamics in Ce(Ru1-xFex)2Al10 (x=0 to 1): magnetic ordering emerging from the Kondo semiconducting state

Cited by in corpus (13)

• muSR and inelastic neutron scattering investigations of the caged type Kondo semimetals: CeT2Al10 (T=Fe, Ru and Os)
• Another dimension: investigations of molecular magnetism using muon-spin relaxation
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• Magnetic ordering with reduced cerium moments in hole-doped CeOs2Al10
• Electronic Structures of CeM2Al10 (M = Fe, Ru, and Os) Studied by Soft X-ray Resonant and High-Resolution Photoemission Spectroscopies
• Contrasting electron and hole doping effects on the spin gap of the caged type Kondo semimetal CeOs${}_2$Al${}_{10}$: A muon spin relaxation and inelastic neutron scattering investigation
• Quantitative study of valence and configuration interaction parameters of the Kondo semiconductors CeM2Al10 (M = Ru, Os and Fe) by means of bulk-sensitive hard x-ray photoelectron spectroscopy
• Anomalous change of the magnetic moment direction by hole doping in CeRu${}_2$Al${}_{10}$
• Contrasting chemical pressure effect on the moment direction in the Kondo semiconductor CeT${}_2$Al${}_{10}$ (T = Ru,Os)
• U(1) Dirac quantum spin liquid candidate in triangular-lattice antiferromagnet CeMgAl${}_{11}$O${}_{19}$
• Anomalous ferromagnetic behavior in the orthorhombic Li${}_3$Co${}_2$SbO${}_6$
• Collapse of the $G{d}^{3+}$ ESR fine structure throughout the coherent temperature of the Gd-doped Kondo Semiconductor $CeF{e}_4{P}_{12}$
• A crossover from Kondo semiconductor to metallic antiferromagnet with $5d$-electron doping in CeFe${}_2$Al${}_{10}$