Use of frit-disc crucibles for routine and exploratory solution growth of single crystalline samples

Canfield, Paul C.; Kong, Tai; Kaluarachchi, Udhara S.; Jo, Na Hyun

doi:10.1080/14786435.2015.1122248

Cited by 246 publications

(203 citation statements)

References 18 publications

(48 reference statements)

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“…32,33 The grown crystals had square plate-like morphology with the c-axis perpendicular to the plate surface with dimensions ranging from 40 to 200 µm.…”

Section: Methodsmentioning

confidence: 99%

Collapsed tetragonal phase transition in LaRu2P2

et al. 2017

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The structural properties of LaRu2P2 under external pressure have been studied up to 14 GPa, employing high-energy x-ray diffraction in a diamond-anvil pressure cell. At ambient conditions, LaRu2P2 (I 4/mmm) has a tetragonal structure with a bulk modulus of B = 105(2) GPa and exhibits superconductivity at Tc = 4.1 K. With the application of pressure, LaRu2P2 undergoes a phase transition to a collapsed tetragonal (cT) state with a bulk modulus of B = 175(5) GPa. At the transition, the c-lattice parameter exhibits a sharp decrease with a concurrent increase of the a-lattice parameter. The cT phase transition in LaRu2P2 is consistent with a second order transition, and was found to be temperature dependent, increasing from P = 3.9(3) GPa at 160 K to P = 4.6(3) GPa at 300 K. In total, our data are consistent with the cT transition being near, but slightly above 2 GPa at 5 K where superconductivity is suppressed. Finally, we compare the effect of physical and chemical pressure in the RRu2P2 (R = Y, La-Er, Yb) isostructural series of compounds and find them to be analogous.

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“…32,33 The grown crystals had square plate-like morphology with the c-axis perpendicular to the plate surface with dimensions ranging from 40 to 200 µm.…”

Section: Methodsmentioning

confidence: 99%

Collapsed tetragonal phase transition in LaRu2P2

et al. 2017

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“…4,8,21,22 The starting elements (Tb: Ames Laboratory Material Preparation Center; Cd: 112 Cd from Cambridge Isotope Laboratories) were packed in a frit-disc crucible set 23 with a molar ratio Tb:Cd = 7:93, which were then sealed in a silica tube under partial Ar atmosphere. The ampoule was heated to 700 • C to realize a homogeneous liquid and slowly cooled to 500 • C over ∼ 130 hours.…”

Section: Methodsmentioning

confidence: 99%

Crystal electric field excitations in the quasicrystal approximantTbCd6studied by inelastic neutron scattering

et al. 2017

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“…1(b). On the other hand, we used a Canfield crucible set (CCS) [19] to grow ZrTe 5 crystals out of the Te flux [18]. A Zr slug (99.95%, Hf nominal 3%) and Te shots (5N) in an atomic ratio of 1∶49 were loaded into the CCS and then sealed in a silica ampoule under vacuum.…”

Section: A Crystal Growthmentioning

confidence: 99%

Bipolar Conduction as the Possible Origin of the Electronic Transition in Pentatellurides: Metallic vs Semiconducting Behavior

et al. 2018

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The pentatellurides ZrTe 5 and HfTe 5 are layered compounds with one-dimensional transition-metal chains that show a not-yet-understood temperature-dependent transition in transport properties as well as recently discovered properties suggesting topological semimetallic behavior. Here, we report magnetotransport properties for two kinds of ZrTe 5 single crystals grown with the chemical vapor transport (CVT) and the flux method (Flux), respectively. They show distinct transport properties at zero field: The CVT crystal displays a metallic behavior with a pronounced resistance peak and a sudden sign reversal in thermopower at approximately 130 K, consistent with previous observations of the electronic transition; in striking contrast, the Flux crystal exhibits a semiconducting-like behavior at low temperatures and a positive thermopower over the whole temperature range. For both samples, strong effects on the transport properties are observed when the magnetic field is applied along the orthorhombic b and c axes, i.e., perpendicular to the chain direction. Refinements on the single-crystal x-ray diffraction and the measurements of energy dispersive spectroscopy reveal the presence of noticeable Te vacancies in the CVT samples, while the Flux samples are close to the stoichiometry. Analyses on the magnetotransport properties confirm that the carrier densities of the CVT sample are about two orders higher than those of the Flux sample. Our results thus indicate that the widely observed anomalous transport behaviors in pentatellurides actually take place in the Te-deficient samples. For the stoichiometric pentatellurides, our electronic structure calculations show narrow-gap semiconducting behavior, with different transport anisotropies for holes and electrons. For the degenerately doped n-type samples, our transport calculations can result in a resistivity peak and crossover in thermopower from negative to positive at temperatures close to those observed experimentally due to a combination of bipolar effects and different anisotropies of electrons and holes. Our present work resolves the long-standing puzzle regarding the anomalous transport behaviors of pentatellurides, as well as the electronic structure in favor of a semiconducting state.

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Use of frit-disc crucibles for routine and exploratory solution growth of single crystalline samples

Cited by 246 publications

References 18 publications

Collapsed tetragonal phase transition in LaRu2P2

Collapsed tetragonal phase transition in LaRu2P2

Crystal electric field excitations in the quasicrystal approximantTbCd6studied by inelastic neutron scattering

Bipolar Conduction as the Possible Origin of the Electronic Transition in Pentatellurides: Metallic vs Semiconducting Behavior

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