Hydrostatic pressure effects on the magnetic susceptibility of ruthenium oxide Sr3Ru2O7: evidence for pressure-enhanced antiferromagnetic instability

Sushko, Yu. V.; deHarak, B.A.; Cao, Gang; Shaw, Gargi; Powell, David K.; Brill, J. W.

doi:10.1016/j.ssc.2004.02.010

Cited by 14 publications

(8 citation statements)

References 36 publications

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“…27 In the present high-pressure experiments, we utilize ac susceptibility measurements to determine J c ͑T͒ for a given YBCO bicrystalline ring. As seen in Fig.…”

Section: A Ambient Pressure Studiesmentioning

confidence: 99%

Pressure-induced enhancement of the critical current density in superconductingYBa2Cu3Oxbicrystalline rings

et al. 2006

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The dependence of the critical current density J c ͑T͒ on hydrostatic He-gas pressure to 0.6 GPa is determined for nearly optimally doped and strongly underdoped melt-textured YBa 2 Cu 3 O x bicrystalline rings containing single ͓001͔-tilt grain boundaries ͑GBs͒ with mismatch angles from 0°to 31°. For all samples with Ͼ 0°, J c is found to increase rapidly under pressure, the rate of increase lying predominantly in the range +20 to +50 % GPa −1 . Within a simple tunneling model, this rate of increase is far too large to be accounted for by a decrease in the GB width W alone. Large oxygen relaxation phenomena in the GB are observed for all rings with finite , particularly if they are underdoped. A diagnostic method is introduced ͑pressure-induced J c relaxation͒ which reveals a significant concentration of vacant oxygen sites in the GB region. A concerted effort to fill such sites with oxygen anions, as well as to chemically compress the GB itself, should lead to significant enhancements in J c under ambient conditions.

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“…27 In the present high-pressure experiments, we utilize ac susceptibility measurements to determine J c ͑T͒ for a given YBCO bicrystalline ring. As seen in Fig.…”

Section: A Ambient Pressure Studiesmentioning

confidence: 99%

Pressure-induced enhancement of the critical current density in superconductingYBa2Cu3Oxbicrystalline rings

et al. 2006

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“…A metamagnetic transition is observed at low temperatures in large magnetic fields [5,6], indicating the presence of quantum criticality. Another signature of this phase competition is found in hydrostatic pressure experiments [8] or Sr-site doping by Ca [7] of Sr 3 Ru 2 O 7 , which stabilizes the antiferromagnetic (AFM) state. In the case of Ca 3 Ru 2 O 7 , which has a lattice structure closely related to that of Sr 3 Ru 2 O 7 , the AFM ordering is observed at low temperature (∼ 56 K).…”

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confidence: 96%

Impurity-induced transition to a Mott insulator inSr3Ru2O7

Mathieu¹,

Asamitsu²,

He³

et al. 2005

Phys. Rev. B

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The electrical, magnetic, and structural properties of Sr3(Ru1−xMnx)2O7 (0 ≤ x ≤ 0.2) are investigated. The parent compound Sr3Ru2O7 is a paramagnetic metal, critically close to magnetic order. We have found that, with a Ru-site doping by only a few percent of Mn, the ground state is switched from a paramagnetic metal to an antiferromagnetic insulator. Optical conductivity measurements show the opening of a gap as large as 0.1 eV, indicating that the metal-to-insulator transition is driven by the electron correlation. The complex low-temperature antiferromagnetic spin arrangement, reminiscent of those observed in some nickelates and manganites, suggests a long range orbital order.PACS numbers: 74.70. Pq, 71.27.+a, 71.30.+h The Ruddelson-Popper-type Sr n+1 Ru n O 3n+1 series show metallic properties, as well as exotic superconductivity and spin/orbital order. SrRuO 3 (n = ∞, perovskite) and Sr 4 Ru 3 O 10 (n = 3) are itinerant ferromagnets with Curie temperatures (T c ) around 160 K and 100 K respectively [1,2]. In contrast, the single-layered Sr 2 RuO 4 (n = 1) and double-layered Sr 3 Ru 2 O 7 (n = 2) do not show ferromagnetism (FM). Sr 2 RuO 4 is a well known superconductor, which displays the unconventional spin-triplet pairing [3]. Sr 3 Ru 2 O 7 (Ru 4+ , 4d 4 ) is essentially paramagnetic[4] although there is some controversy in the literature related to the presence of ferromagnetic SrRuO 3 and Sr 4 Ru 3 O 10 impurities. A metamagnetic transition is observed at low temperatures in large magnetic fields [5,6], indicating the presence of quantum criticality. Another signature of this phase competition is found in hydrostatic pressure experiments [8] or Sr-site doping by Ca [7] of Sr 3 Ru 2 O 7 , which stabilizes the antiferromagnetic (AFM) state. In the case of Ca 3 Ru 2 O 7 , which has a lattice structure closely related to that of Sr 3 Ru 2 O 7 , the AFM ordering is observed at low temperature (∼ 56 K). The system remains metallic below this temperature, but near 48 K, a first-order-like transition to a less conductive state is observed [9].In this article, we investigate the effects of the Rusite doping by Mn of Sr 3 Ru 2 O 7 . A metal-to-insulator transition is observed as the Mn content increases. Optical conductivity measurements reveal the opening of a Mott-like gap [10]. Neutron diffraction experiments show that the low temperature insulating state is associated with a novel antiferromagnetic spin arrangement, which suggests some complex orbital order. Interestingly, while there are many observations of insulator-to-metal transitions upon tuning of one-electron bandwidth or bandfilling by doping [11], there are few reports of the opposite, i.e. of the formation of a Mott-like insulating state upon addition of impurities in a metal. One example of such impurity doping effects is found in the Mott insulator V 2 O 3 . As V 3+ is replaced by Ti 3+/4+ , the system becomes metallic by modification of the band filling and/or bandwidth [12]. However, the replacement of V 3+by Cr 3+ instead strengthens the e...

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“…Then, this intrinsic stress and strain (with large enough magnitude) can induce structural anisotropies [3,4] and cause the magnetic behavior to be deviated from the ideal stress-strain free condition. For instance, in some magnetic systems, the anisotropies arisen from stresses were found to essentially shift the magnetic phase transition and its critical phenomena [5][6][7][8]. As a result, it is very important to consider the stretchable phenomena and its corresponding latticemismatch induced strain in modelling real ferromagnetic materials especially in thin-film structure (reduced geometry), where the magnetostrictive effect (or the magnetostriction) is very important.…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo Investigation of Spatially Adaptable Magnetic Behavior in Stretchable Uniaxial Ferromagnetic Monolayer Film

Laosiritaworn¹,

Laosiritaworn²

2015

Journal of Magnetics

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In this work, Monte Carlo simulation was employed to model the stretchable Ising monolayer film to investigate the effect of the spatial distance variation among magnetic atoms on magnetic behavior of the film. The exchange interaction was considered as functions of initial interatomic distance and the stretched distance (or the strain). Following Bethe-Slater picture, the magnetic exchange interaction took the Lennard-Jones potential-like function. Monte Carlo simulations via the Wolff and Metropolis algorithms were used to update the spin systems, where equilibrium and dynamic magnetic profiles were collected. From the results, the strain was found to have strong influences on magnetic behavior, especially the critical behavior. Specifically, the phase transition point was found to either increase or decrease depending on how the exchange interaction shifts (i.e. towards or away from the maximum value). In addition, empirical functions which predict how the critical temperatures scale with initial interatomic distance and the strain were proposed, which provides qualitatively view how to fine tune the magnetic critical point in monolayer film using the substrate modification induced strain.

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Hydrostatic pressure effects on the magnetic susceptibility of ruthenium oxide Sr3Ru2O7: evidence for pressure-enhanced antiferromagnetic instability

Cited by 14 publications

References 36 publications

Pressure-induced enhancement of the critical current density in superconductingYBa2Cu3Oxbicrystalline rings

Pressure-induced enhancement of the critical current density in superconductingYBa2Cu3Oxbicrystalline rings

Impurity-induced transition to a Mott insulator inSr3Ru2O7

Monte Carlo Investigation of Spatially Adaptable Magnetic Behavior in Stretchable Uniaxial Ferromagnetic Monolayer Film

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