Pressure transmitting medium Daphne 7474 solidifying at 3.7 GPa at room temperature

Murata, Keizo; Yokogawa, Keiichi; Yoshino, Hideaki; Klotz, Stefan; Munsch, P.; Irizawa, Akinori; Nishiyama, M.; Iizuka, K.; Nanba, Tetsuya; Okada, Tahei; Shiraga, Yoshitaka; Aoyama, Shoji

doi:10.1063/1.2964117

Cited by 190 publications

(143 citation statements)

References 14 publications

(5 reference statements)

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“…The body of the cell is made of Cu-Ti alloy and the gasket is made of Cu-Be. Daphne 7474 was used as a pressure transmitting medium [34], and the pressure was determined at 77 K by the ruby fluorescence technique. …”

Section: Methodsmentioning

confidence: 99%

Suppression of ferromagnetism in the La(V_xCr_1−x)Sb₃system

Lin

Taufour

Bud’ko

et al. 2014

Philosophical Magazine

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To explore the possibility of quantum phase transitions and even quantum criticality in LaCrSb 3 based compounds, we performed measurements under pressure as well as a vanadium substitution study. The Curie temperature of LaCrSb 3 was found to be invariant under pressure. Although pressure was not able to suppress the ferromagnetism, chemical substitution was used as another parameter to tune the magnetism. We grew La(VxCr 1−x )Sb 3 (x = 0 -1.0) single crystals, and studied the series by measurements of temperature and field dependent magnetic susceptibility, magnetization, resistivity, and specific heat. Ferromagnetism has been observed for x ≤ 0.22, and the system manifests a strong anisotropy in its ordered state. The Curie temperature decreases monotonically as the V concentration increases. For 0.42 ≤ x ≤ 0.73, the system enters a new magnetic state at low temperatures, and no magnetic ordering above 1.8 K can be observed for x ≥ 0.88. The effective moment µ eff /Cr varies only slightly as the V concentration increases, from 3.9 µ B for x = 0 to 2.9 µ B for x = 0.88. Features related to quantum criticality have not been observed in the La(VxCr 1−x )Sb 3 system.

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Section: Methodsmentioning

confidence: 99%

Suppression of ferromagnetism in the La(V_xCr_1−x)Sb₃system

Lin

Taufour

Bud’ko

et al. 2014

Philosophical Magazine

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“…Daphne 7474 was used as pressure transmitting medium. 12,13 The viscosity of the Daphne 7474 is two orders of magnitude lower than that of the Daphne 7373 and a Fluorinert mixture, 14,15 commonly used in the previous studies. 4,5,7 This indicates the better pressure quality in the present study.…”

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confidence: 99%

Strong correlation between anomalous quasiparticle scattering and unconventional superconductivity in the hidden-order phase of URu2Si2

et al. 2012

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The pressure dependent electrical resistivity of URu2Si2 has been studied at high pressure across the first order phase boundary of Px where the ground state switches under pressure from "hidden order" (HO) to large moment antiferromagnetic (LAFM) states. The electrical transport in URu2Si2 at low temperatures shows a strong sample dependence. We have measured an ultra-clean single crystal whose quality is the highest among those used in previous studies. The generalized power law ρ = ρ0 + AnT n analysis finds that the electric transport property deviates from Fermi liquid theory in the HO phase but obeys the theory well above Px. The analysis using the polynomial in T expression ρ = ρ0 + α1T + α2T 2 reveals the relation α1/α2 ∝ Tsc in the HO phase. While the pressure dependence of α2 is very weak, α1 is roughly proportional to Tsc. This suggests a strong correlation between the anomalous quasiparticle scattering and the superconductivity and that both have a common origin. The present study clarifies a universality of the HO phase inherent in strongly correlated electron superconductors near quantum criticality.

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“…(Hydrostaticity of these pressure transmitting media in DAC have been studied in detail. [41][42][43][44][45][46] ) Based on these considerations and the results in Fig. 1, it is reasonable to assume that the sample be in the SC state at 4 and 6 GPa in this study, although no resistivity measurement has been made.…”

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confidence: 99%

Pressure Suppression of Spin-Density-Wave Gap in the Optical Conductivity of SrFe₂As₂

et al. 2013

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Optical reflectance R(ω) of a pressure-induced superconductor SrFe2As2 has been measured under external pressure to 6 GPa and at temperatures to 8 K. Optical conductivity σ(ω) has been derived from the measured R(ω). At ambient pressure, in the antiferromagnetic state below TN=198 K, a pronounced feature develops in σ(ω) due to the opening of a spin density wave (SDW) gap, as already reported in the literature. With increasing pressure, the SDW gap feature in σ(ω) is progressively suppressed. At 4 GPa, where the sample is superconducting, the SDW gap feature in σ(ω) is strongly reduced than that at ambient pressure, but is still clearly observed. At 6 GPa, the SDW gap is completely suppressed. The pressure evolutions of the SDW gap magnitude and the spectral weight closely follow the pressure evolution of TN. PACS numbers:Regarding the superconductivity (SC) exhibited by Fe-based compounds, 1 the pressure-induced SC exhibited by the stoichiometric "122" compounds AFe 2 As 2 (A=Ba, Ca, Sr, Eu) have attracted much interest. 2-13 They exhibit SC with external pressure only, although many other families of Fe based superconductors require some form of chemical doping or deviation from stoichiometry to exhibit SC. 1 In particular, SrFe 2 As 2 (Sr122) and BaFe 2 As 2 (Ba122) show pressure-induced SC at relatively high temperatures of T c =34 K 5,7-9 and 28 K, 4,7,9,11 , respectively. Interestingly, the 122 compounds also show SC with chemical doping, as shown by (Sr, K)Fe 2 As 2 , 14 Sr(Fe,Co) 2 As 2 , 15 and SrFe 2 (As, P) 2 . 16 At ambient pressure, the stoichiometric 122 compounds are antiferromagnetic (AFM), poor metals. For Sr122 and Ba122, the AFM transition temperature (T N ) is 198 K and 136 K, respectively. At T N , the resistivity [ρ(T )] shows a kink and rapid decrease with cooling below T N . With increasing pressure, T N is gradually lowered, and the kink in ρ(T ) becomes broadened. Above a critical pressure, the SC appears. Similar suppression of AFM and emergence of SC have also been observed with chemical doping. [14][15][16] In this regard, both methods have provided a lot of insight, but one advantage of the pressure technique compared with chemical doping is that the former does not cause disorder in the crystal lattice.However, there is an additional complication regarding the pressure-induced SC in the 122 compounds. Namely, it has been shown that the pressure evolutions of the AFM and SC states strongly depend on the hydrostaticity. 8,11,12 Here, hydrostaticity refers to how isotropic the pressure acting on the sample is. The hydrostaticity in a high pressure experiment depends on the types of pressure cell and pressure transmitting medium used. Figure 1 summarizes the results of high pressure studies on Sr122. 4,5,7-9 As discussed in detail later, these results show that the AFM state is suppressed and SC appears at lower pressure when the applied pressure is less hydrostatic (more uniaxial). This may indicate that a uniaxial stress promotes SC in the 122 compounds.To probe the microscopic elect...

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Pressure transmitting medium Daphne 7474 solidifying at 3.7 GPa at room temperature

Cited by 190 publications

References 14 publications

Suppression of ferromagnetism in the La(V_xCr_1−x)Sb₃system

Suppression of ferromagnetism in the La(V_xCr_1−x)Sb₃system

Strong correlation between anomalous quasiparticle scattering and unconventional superconductivity in the hidden-order phase of URu2Si2

Pressure Suppression of Spin-Density-Wave Gap in the Optical Conductivity of SrFe₂As₂

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Pressure transmitting medium Daphne 7474 solidifying at 3.7 GPa at room temperature

Cited by 190 publications

References 14 publications

Suppression of ferromagnetism in the La(VxCr1−x)Sb3system

Suppression of ferromagnetism in the La(VxCr1−x)Sb3system

Strong correlation between anomalous quasiparticle scattering and unconventional superconductivity in the hidden-order phase of URu2Si2

Pressure Suppression of Spin-Density-Wave Gap in the Optical Conductivity of SrFe2As2

Contact Info

Product

Resources

About

Suppression of ferromagnetism in the La(V_xCr_1−x)Sb₃system

Suppression of ferromagnetism in the La(V_xCr_1−x)Sb₃system

Pressure Suppression of Spin-Density-Wave Gap in the Optical Conductivity of SrFe₂As₂