Floating zone growth of eutectic Srn+1RunO3n+1 crystals

Fittipaldi, R.; Granata, V.; Vecchione, A.

doi:10.1002/crat.201000615

Cited by 7 publications

(3 citation statements)

References 15 publications

(17 reference statements)

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“…Details on the growth procedure of the samples used in this study are reported in Refs. 37,38 . The structural quality, composition and magnetic as well as electrical properties of the single crystals were characterised by X-ray diffraction, energy dispersive microscopy, scanning electron microscopy, specific heat, resistivity and susceptibility measurements.…”

Section: Methods and Experimental Detailsmentioning

confidence: 99%

Fermi surface and kink structures in $$\hbox {Sr}_{{4}}\hbox {Ru}_{{3}}\hbox {O}_{{10}}$$ revealed by synchrotron-based ARPES

Ngabonziza

Carleschi

Zabolotnyy

et al. 2020

Sci Rep

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The low-energy electronic structure, including the Fermi surface topology, of the itinerant metamagnet $$\hbox {Sr}_{{4}}\hbox {Ru}_{{3}}\hbox {O}_{{10}}$$ Sr 4 Ru 3 O 10 is investigated for the first time by synchrotron-based angle-resolved photoemission. Well-defined quasiparticle band dispersions with matrix element dependencies on photon energy or photon polarization are presented. Four bands crossing the Fermi-level, giving rise to four Fermi surface sheets are resolved; and their complete topography, effective mass as well as their electron and hole character are determined. These data reveal the presence of kink structures in the near-Fermi-level band dispersion, with energies ranging from 30 to 69 meV. Together with previously reported Raman spectroscopy and lattice dynamic calculation studies, the data suggest that these kinks originate from strong electron–phonon coupling present in $$\hbox {Sr}_{{4}}\hbox {Ru}_{{3}}\hbox {O}_{{10}}$$ Sr 4 Ru 3 O 10 . Considering that the kink structures of $$\hbox {Sr}_{{4}}\hbox {Ru}_{{3}}\hbox {O}_{{10}}$$ Sr 4 Ru 3 O 10 are similar to those of the other three members of the Ruddlesden Popper structured ruthenates, the possible universality of strong coupling of electrons to oxygen-related phonons in $$\hbox {Sr}_{n+1}\hbox {Ru}_{{n}}\hbox {O}_{3n+1}$$ Sr n + 1 Ru n O 3 n + 1 compounds is proposed.

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Section: Methods and Experimental Detailsmentioning

confidence: 99%

Fermi surface and kink structures in $$\hbox {Sr}_{{4}}\hbox {Ru}_{{3}}\hbox {O}_{{10}}$$ revealed by synchrotron-based ARPES

Ngabonziza

Carleschi

Zabolotnyy

et al. 2020

Sci Rep

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“…Details on the growth methodology are given elsewhere [27,30,31]. Composition, crystalline structure, and quality of the crystals were checked by means of energy dispersive spectroscopy, scanning electron microscopy, polarizedlight optical microscopy, electron backscattered diffraction, specific heat, x-ray diffraction, and susceptibility measurements.…”

Section: Methodsmentioning

confidence: 99%

Double metamagnetic transition inSr4Ru3O10

et al. 2014

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We report a magnetization study down to 1.7 K for the trilayered ruthenate Sr 4 Ru 3 O 10 for magnetic fields applied within the ab plane. Our measurements reveal that the metamagnetic jump appearing in the isothermal magnetization curves below T M = 68 K is actually composed of two consecutive metamagnetic transitions, where the increase in the magnetization due to the second transition is roughly one third of the overall metamagnetic jump. We show that the metamagnetic critical fields for these two transitions increase as the temperature decreases, and that their difference has a weak temperature dependence that opens up in the proximity of the critical region near T M . We discuss the origin of this double metamagnetic transition being due to either the ordering of the Ru 4d magnetic moments in the two inequivalent crystallographic Ru sites or to the presence of two van Hove singularities in the near-Fermi-level density of states.

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“…For the crystal growth we used a 6-mm-diameter feed rod and Sr 4 Ru 3 O 10 crystals from previous growth as seed. Growth speed, atmosphere, and pressure were selected on the basis of previous experience, 20 to obtain pure Sr 4 Ru 3 O 10 single crystals. They tend to cleave parallel to the growth direction as in the other members of the series.…”

Section: A Samples and Proceduresmentioning

confidence: 99%

Anisotropic optical conductivity of Sr4Ru3O10

et al. 2012

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The optical conductivity sigma(omega) of Sr4Ru3O10 has been studied by means of reflectivity measurements between 12 and 300 K both in the ab planes (from 40 to 28 000 cm(-1)) and along the c axis (from 40 to 19 000 cm(-1)). In the far and mid infrared, sigma(ab)(omega) results from a superposition of a Drude term, with a plasma frequency which increases below the ferromagnetic transition at T-c = 105 K, and of two bands in the infrared. One is peaked at about 400 cm(-1) for T < 300 K, but softens to 300 cm(-1) at room temperature. The other one is peaked at 1300 cm(-1) and, below T-c, provides spectral weight to the Drude term, suggesting that it has a magnetic origin. Along the c axis, sigma(c)(omega) is instead that of a good insulator, with phonon peaks whose frequencies omega(ph) regularly increase as T decreases. For the mode at the highest frequency, however, which can be assigned to the apical oxygens of the RuO6 octahedra, both omega(ph) and the intensity I-ph have an anomalous behavior below T-c

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Floating zone growth of eutectic Sr_n+1Ru_nO_3n+1 crystals

Cited by 7 publications

References 15 publications

Fermi surface and kink structures in $$\hbox {Sr}_{{4}}\hbox {Ru}_{{3}}\hbox {O}_{{10}}$$ revealed by synchrotron-based ARPES

Fermi surface and kink structures in $$\hbox {Sr}_{{4}}\hbox {Ru}_{{3}}\hbox {O}_{{10}}$$ revealed by synchrotron-based ARPES

Double metamagnetic transition inSr4Ru3O10

Anisotropic optical conductivity of Sr4Ru3O10

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