Low-temperature anomalies in magnetic, transport, and thermal properties of single-crystal CeRhSn with valence fluctuations

Kim, Moo-Sung; Echizen, Y.; Umeo, Kazunori; Kobayashi, Sinichiro; Sera, Masafumi; Salamakha, P.; Sologub, O.; Takabatake, Toshiro; Chen, X.; Tayama, Takashi; Sakakibara, Toshiro; Jung, Myung‐Hwa; Maple, M. B.

doi:10.1103/physrevb.68.054416

Cited by 54 publications

(56 citation statements)

References 33 publications

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“…LaRhSn is a superconductor with TC=2 K [301]. CeRhSn shows valence fluctuation and highly anisotropic behavior as shown by single crystal study [302]. A strong enhancement in the heat capacity and magnetic susceptibility data below 7 K in this compound was observed, which was reported to arise due to the presence of unquenched moments in the quasi-Kagome lattice of Ce-Rh plane [302].…”

Section: Rrhx Compoundsmentioning

confidence: 99%

“…The resistivity in CeRhSn shows high anisotropy, which indicates the valence fluctuation in this compound [302]. At high temperature, the compounds of RRhSn (R=Tb-Tm) show non-linear temperature dependence with negative curvature, attributed to s-d scattering of conduction electrons and is a characteristic of itinerant systems [313].…”

Section: Magneto-transport Propertiesmentioning

confidence: 99%

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Review on magnetic and related properties of RTX compounds

Gupta

Суреш

2015

Journal of Alloys and Compounds

245

124

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RTX (R=rare earths, T= 3d/4d/5d, transition metals such as Sc, Ti, Mn, Fe, Co, Ni, Cu, Ru, Rh, Pd, Ag, Os, Ir, Pt, Au, and X=p-block elements such as Al, Ga, In, Si, Ge, Sn, As, Sb, Bi) series is a huge family of intermetallics compounds. These compounds crystallize in different crystal structures depending on the constituents. Though these compounds have been known for a long time, they came to limelight recently in view of the large magnetocaloric effect (MCE) and magnetoresistance (MR) shown by many of them. Most of these compounds crystallize in hexagonal and tetragonal crystal structures. Some of them show crystal structure modification with annealing temperature; while a few of them show iso-structural transition in the paramagnetic regime. Their magnetic ordering temperatures vary from very low temperatures to temperatures well above room temperature (~510 K). Depending on the crystal structure, they show a variety of magnetic and electrical properties.These compounds have been characterized by means of a variety of techniques/measurements such as x-ray diffraction, neutron diffraction, magnetic properties, heat capacity, magnetocaloric properties, electrical resistivity, magnetoresistance, thermoelectric power, thermal expansion, Hall effect, optical properties, XPS, Mössbauer spectroscopy, ESR, μSR, NMR, NQR etc. Some amount of work on theoretical calculations on electronic structure, crystal field interaction and exchange interactions has also been reported. The interesting aspect of this series is that they show a variety of physical properties such as Kondo effect, heavy fermion behavior, spin glass state, intermediate valence, superconductivity, multiple magnetic transitions, metamagnetism, large MCE, large positive as well as negative MR, spin orbital compensation, magnetic polaronic behavior, pseudo gap effect etc.Except Mn, no other transition metal in these compounds possesses considerable magnetic moments.Because of this RMnX compounds in general have high ordering temperatures. Interstitial modification using hydrogen and nitrogen is found to alter their crystal structures and magnetic properties considerably. RTX compounds also show interesting pressure effects on their structural and magnetic properties. In summary, these compounds show variety of physical properties over a wide range of temperatures. This review is intended to cover all the important results obtained in this family, particularly in the last few years.

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Section: Rrhx Compoundsmentioning

confidence: 99%

Section: Magneto-transport Propertiesmentioning

confidence: 99%

Review on magnetic and related properties of RTX compounds

Gupta

Суреш

2015

Journal of Alloys and Compounds

245

124

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“…liquid (NFL) behaviour at low temperatures indicated by electrical resistivity, specific heat and magnetic susceptibility measurements [16,17]. The Griffiths-McCoy model has been successfully applied for this compound and provides the description of its NFL properties [18].…”

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confidence: 99%

Electronic structure of CeRhX (X = Sn, In)

2009

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Abstract. Electronic structure of the compounds CeRhIn and CeRhSn have been studied by the X-ray photoemission spectroscopy (XPS) and ab initio band structure calculations. CeRhSn shows the non-Fermi liquid characteristics at low temperatures, while CeRhIn exhibits a Fermi-liquid ground state. At ambient temperature the XPS data reveal an intermediate valence state of Ce ions in both systems. The Ce corelevel XPS spectra are very similar and indicate the strong coupling of the Ce 4f and the conduction band states (Δ ≈ 100 meV). The valence band spectra we interpret with the help of ab initio calculations as well as using the results for the reference compounds LaRhIn and LaRhSn. The comparative analysis of the theoretical band structures and charge density plots reveal the changes in chemical bonding and the hybridization between the Ce 4f and the other valence states introduced by the replacement of In by Sn atoms. The more covalent character of the chemical bonding in the stannides is in line with the smaller thermal expansion. Finally, for CeRhIn we found a typical temperature dependence of the crystal lattice, while CeRhSn shows distinct anomaly at about 120 K, presumably related to the change in planar Ce-Rh bonds.PACS. 79.60.-i Photoemission and photoelectron spectra -71.20.LP Intermetallic compounds -71.27.+a Strongly correlated electron systems; heavy fermions

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“…The residual resistivity of CeRhSn measured in high magnetic fields up to 18 T increases, however, with increasing magnetic field [10]. This observation suggests that an additional scattering mechanism originating from magnetic moments operates below 10 K [10]. In figure 1 (a) and (b), the electrical resistivity exhibits a broad and weak feature at T f , which displays a positive shift of about ∂T f /∂P ≈ 30 mK/kbar with increasing pressure, that is characteristic of many well known classical spin glasses, e.g.…”

Section: Discussionmentioning

confidence: 99%

High-pressure study of non-Fermi liquid and spin-glass-like behavior in CeRhSn

Zocco¹,

Ślebarski²,

Maple³

2012

J. Phys.: Condens. Matter

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We present measurements of the temperature dependence of electrical resistivity ρ(T ) of CeRhSn up to ∼ 27 kbar. At low temperatures, ρ(T ) varies linearly with T for all pressures, indicating non-Fermi liquid behavior. Below T f ∼ 6 K, ρ(T ) deviates from a linear dependence. We found that the low-T feature centered at T = T f shows a pressure dependence ∂T f /∂P ≈ 30 mK/kbar which is typical of canonical spin glasses. This interplay between spin-glass-like and non-Fermi liquid behavior was observed in both CeRhSn and a Ce0.9La0.1RhSn alloy.

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Low-temperature anomalies in magnetic, transport, and thermal properties of single-crystal CeRhSn with valence fluctuations

Cited by 54 publications

References 33 publications

Review on magnetic and related properties of RTX compounds

Review on magnetic and related properties of RTX compounds

Electronic structure of CeRhX (X = Sn, In)

High-pressure study of non-Fermi liquid and spin-glass-like behavior in CeRhSn

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