Procedure for measuring electrical resistivity of anisotropic materials: A revision of the Montgomery method

Santos, C. A. M. dos; Campos, André Gambier; Luz, M. S. da; White, B. D.; Neumeier, J. J.; Lima, Bruno R.; Shigue, C.Y.

doi:10.1063/1.3652905

Cited by 50 publications

(53 citation statements)

References 23 publications

(46 reference statements)

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“…The basic characteristic studies of structural, magnetic and transport properties of BaCo 2 As 2 single crystal at ambient pressure was analyzed in detail and reported previously by Sefat et al [10]. The electrical resistivity was measured by a standard fourprobe dc technique [11]. High pressure was generated by using a cubic anvil type high pressure apparatus consisting of six tungsten carbide anvils, which has been proved to produce a homogeneous pressure [12].…”

Section: Methodsmentioning

confidence: 99%

Hydrostatic pressure (8 GPa) dependence of electrical resistivity of BaCo2As2 single crystal

Ganguli

Matsubayashi

Ohgushi

et al. 2013

Materials Research Bulletin

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Section: Methodsmentioning

confidence: 99%

Hydrostatic pressure (8 GPa) dependence of electrical resistivity of BaCo2As2 single crystal

Ganguli

Matsubayashi

Ohgushi

et al. 2013

Materials Research Bulletin

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“…In order to determine the values of sheet resistance along the main crystallographic directions of the δ-LCO thin film (Rs1 and Rs2) from R1 and R2, we applied the method explained in the reference. 25 The method is a revision of the Montgomery method, 26 and it allows us to determine the 2D electrical sheet resistance tensor of the tetragonal structure of the δ-LCO thin film. The third resistance was the Hall Resistance denoted by Rxy.…”

Section: Transport and Magneto-transport Measurements Results Andmentioning

confidence: 99%

Electronically driven superconductor-insulator transition in electrostatically doped La2CuO4+δthin films

et al. 2013

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Using an electronic double layer transistor we have systematically studied the superconductor to insulator transition in La2CuO 4+δ thin films growth by ozone assisted molecular beam epitaxy. We have confirmed the high crystalline quality of the cuprate films and have demonstrated the suitability of the electronic double layer technique to continuously vary the charge density in a system that is otherwise characterized by the presence of miscibility gaps. The transport and magneto-transport results highlight the role of electron-electron interactions in the mechanism of the transition due to the proximity of the Mott insulating state.

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“…The electrical resistivity ρ(T) is a measure of how strongly coupled the quasi-particles are to the QC fluctuations that dominate the magnetic susceptibility and specific heat at low temperatures and fields. We carried out measurements of the anisotropy of ρ(T), using a modified Montgomery technique (35). Fig.…”

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confidence: 99%

Quantum critical fluctuations in layered YFe ₂ Al ₁₀

Kim

Park

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

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The absence of thermal fluctuations at T = 0 makes it possible to observe the inherently quantum mechanical nature of systems where the competition among correlations leads to different types of collective ground states. Our high precision measurements of the magnetic susceptibility, specific heat, and electrical resistivity in the layered compound YFe 2 Al 10 demonstrate robust field-temperature scaling, evidence that this system is naturally poised without tuning on the verge of ferromagnetic order that occurs exactly at T = 0, where magnetic fields drive the system away from this quantum critical point and restore normal metallic behavior.quantum criticality | ferromagnet | dynamical scaling T he interplay of competing interactions is responsible for the array of ground states that are possible in correlated electron systems. It is of particular importance to understand how one such ground state gives way to another when the system is tuned at temperature T = 0, without the complications of thermal fluctuations. Consequently, much interest has focused on quantum critical points (QCPs), where an ordered phase can be created by an infinitesimal modifications of pressure, composition, or field. The onset of ferromagnetic order is perhaps the simplest T = 0 phase transition, and indeed much experimental and theoretical effort has been directed toward understanding its essential features (1-6). It is generally believed that ferromagnetic order occurs at T = 0 via a discontinuous or first order transition, as is observed in the clean ferromagnets ZrZn 2 (7) and MnSi (8) under pressure. Disorder is known to render the ferromagnetic transition continuous, leading to the mean field behavior that is found when doping drives T C = 0 in Ni 1−x Pd x (9), Zr 1−x Nb x Zn 2 (10), and Nb 1−y Fe 2+y (11). More controversial is the possibility that strong quantum fluctuations, such as those that destabilize order in low-dimensional systems, may be significant near the T C = 0 ferromagnetic transition and perhaps may even destroy its first-order character (5). A complete experimental investigation of the critical phenomena and their scaling behaviors in a carefully selected system where disorder is minimal is needed to establish that quantum critical fluctuations are both present and relevant to the destabilization of ferromagnetic order.Progress toward obtaining this information has been painstaking, although a number of systems have been identified where the Curie temperature T C has been driven to zero. High pressure experiments evade the disorder that necessarily accompanies doping, but thus far only resistivity and susceptibility measurements have been reported. Complete experimental access is possible when doping is used to suppress T C → 0, but even small amounts of compositional inhomogeneity can obscure any intrinsic critical fluctuations of T C = 0 ferromagnetic transitions, resulting in interesting complications such as the Griffiths phase (12,13,14), as well as short ranged order, including spin glasses (15). Alterna...

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Procedure for measuring electrical resistivity of anisotropic materials: A revision of the Montgomery method

Cited by 50 publications

References 23 publications

Hydrostatic pressure (8 GPa) dependence of electrical resistivity of BaCo2As2 single crystal

Hydrostatic pressure (8 GPa) dependence of electrical resistivity of BaCo2As2 single crystal

Electronically driven superconductor-insulator transition in electrostatically doped La2CuO4+δthin films

Quantum critical fluctuations in layered YFe ₂ Al ₁₀

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Procedure for measuring electrical resistivity of anisotropic materials: A revision of the Montgomery method

Cited by 50 publications

References 23 publications

Hydrostatic pressure (8 GPa) dependence of electrical resistivity of BaCo2As2 single crystal

Hydrostatic pressure (8 GPa) dependence of electrical resistivity of BaCo2As2 single crystal

Electronically driven superconductor-insulator transition in electrostatically doped La2CuO4+δthin films

Quantum critical fluctuations in layered YFe 2 Al 10

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Quantum critical fluctuations in layered YFe ₂ Al ₁₀