<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>μ</mml:mi><mml:mi>SR</mml:mi></mml:math>and inelastic neutron scattering investigations of the noncentrosymmetric antiferromagnet<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi mathvariant="normal">CeNiC</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:math>

Bhattacharyya, A.; Adroja, D. T.; Strydom, A. M.; Hillier, A. D.; Taylor, J. W.; Thamizhavel, A.; Dhar, S. K.; Kockelmann, W.; Rainford, B.D.

doi:10.1103/physrevb.90.054405

Cited by 15 publications

(12 citation statements)

References 34 publications

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“…There are still some weak fluctuations below transition temperature, which are slightly reduced in the longitudinal field. Analogous field-dependent λ has been observed in CeNiC 2 with a long-range antiferromagnetic ground state and in CePd 0.15 Rh 0.85 with paramagnetic non-Fermi-liquid ground state [31,40].…”

Section: Resultssupporting

confidence: 66%

“…, where N f (t ) and N b (t ) are the total positrons counted by the forward and backward detectors, respectively, and α is a constant reflecting the relative counting efficiencies of the forward and backward counters, which can be determined from a calibration measurement [31]. The data were analyzed using the free software package MANTID [32].…”

Section: Experimental Methodsmentioning

confidence: 99%

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Magnetic ground state of KCr3As3

et al. 2019

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Many unconventional superconductors, such as cuprates and iron-based materials, display spin-glass states in the underdoped regime, which usually coexist and/or compete with unconventional superconductivity. Here, we performed zero-field (ZF) and longitudinal-field (LF) muon spin-rotation experiments (μSR) on quasi-onedimensional KCr 3 As 3. Our ZF μSR measurements reveal a large decrease (about 1/3) in the initial asymmetry below 10 K, indicating the presence of a magnetic phase transition. The analysis of the LF μSR results illustrates this transition at the same temperature, and points it to a spin-glassy state. These results would, potentially, confirm unconventional superconductivity in K-Cr-As and related compounds.

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Section: Resultssupporting

confidence: 66%

Section: Experimental Methodsmentioning

confidence: 99%

Magnetic ground state of KCr3As3

et al. 2019

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“…However, the associated internal fields are found to be the same order of magnitude compared to CeRu 2 Al 10 (B int = 10 mT at base temperature). In order to find out the nature of the magnetic interaction, the temperature dependence of internal field was fitted [40]:…”

Section: B Neutron Diffraction: Onset Of Magnetic Long-range Ordermentioning

confidence: 99%

Anomalous change of the magnetic moment direction by hole doping inCeRu2Al10

et al. 2014

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We present a detailed investigation of the hole (3% Re) doping effect on the polycrystalline CeRu 2 Al 10 sample by magnetization, heat capacity, resistivity, muon spin relaxation (μSR), and neutron scattering (both elastic and inelastic) measurements. CeRu 2 Al 10 is an exceptional cerium compound with an unusually high Néel temperature of 27 K. Here we study the stability of the unusual magnetic order by means of controlled doping, and we uncover further surprising attributes of this phase transition. The heat capacity, resistivity, and μSR measurements reveal an onset of magnetic ordering below 23 K, while a broad peak at 31 K (i.e., above T N ) has been observed in the temperature dependent susceptibility, indicating an opening of a spin gap above T N . Our important finding, from the neutron diffraction, is that the compound orders antiferromagnetically with a propagation vector k = (1,0,0) and the ordered state moment is 0.20(1) μ B along the b axis. This is in sharp contrast to the undoped compound, which shows AFM ordering at 27 K with the ordered moment of 0.34-0.42 μ B along the c axis. Similar to CeRu 2 Al 10 our inelastic neutron scattering study on the Re-doped compound shows a sharp spin gap-type excitation near 8 meV at 5 K, but with slightly reduced intensity compared to the undoped compound. Further the excitation broadens and shifts to lower energy ( 4 meV) near 35 K. These results suggest that the low temperature magnetic properties of the hole-doped sample are governed by the competition between the anisotropic hybridization effect and the crystal field anisotropy as observed in hole-doped CeOs 2 Al 10 .

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“…In principle this could originate from various phenomena related to a change in distribution of internal fields, but a structural transition is a likely candidate in view of the structural instability reported on this system [2]. To find out the value of critical exponents and hence get more information on the nature of the magnetic transition, the temperature dependence of the internal field was fitted [47]:…”

Section: Muon Spin Relaxationmentioning

confidence: 99%

Contrasting effect of La substitution on the magnetic moment direction in the Kondo semiconductorsCeT2Al10(T=Ru,Os)

Adroja

Hillier²,

Ritter³

et al. 2015

Phys. Rev. B

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The opening of a spin gap in the orthorhombic compounds CeT2Al10 (T = Ru and Os) is followed by antiferromagnetic ordering at TN = 27 K and 28.5 K, respectively, with a small ordered moment (0.29−0.34µB ) along the c−axis, which is not an easy axis of the crystal field (CEF). In order to investigate how the moment direction and the spin gap energy change with 10% La doping in Ce1−xLaxT2Al10 (T = Ru and Os) and also to understand the microscopic nature of the magnetic ground state, we here report on magnetic, transport, and thermal properties, neutron diffraction (ND) and inelastic neutron scattering (INS) investigations on these compounds. Our INS study reveals the persistence of spin gaps of 7 meV and 10 meV in the 10% La-doped T = Ru and Os compounds, respectively. More interestingly our ND study shows a very small ordered moment of 0.18 µB along the b−axis (moment direction changed compared with the undoped compound), in Ce0.9La0.1Ru2Al10, however a moment of 0.23 µB still along the c−axis in Ce0.9La0.1Os2Al10. This contrasting behavior can be explained by a different degree of hybridization in CeRu2Al10 and CeOs2Al10, being stronger in the latter than in the former. Muon spin rotation (µSR) studies on Ce1−xLaxRu2Al10 (x = 0, 0.3, 0.5 and 0.7), reveal the presence of coherent frequency oscillations indicating a long−range magnetically ordered ground state for x = 0 to 0.5, but an almost temperature independent Kubo−Toyabe response between 45 mK and 4 K for x = 0.7. We will compare the results of the present investigations with those reported on the electron and hole−doping in CeT2Al10.

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μSRand inelastic neutron scattering investigations of the noncentrosymmetric antiferromagnetCeNiC2

Cited by 15 publications

References 34 publications

Magnetic ground state of KCr3As3

Magnetic ground state of KCr3As3

Anomalous change of the magnetic moment direction by hole doping inCeRu2Al10

Contrasting effect of La substitution on the magnetic moment direction in the Kondo semiconductorsCeT2Al10(T=Ru,Os)

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