Mechanical behaviour of AgB2 in comparison to MgB2––a first principle study

Parvin, F.; Islam, A. K. M. A.; Islam, Farhan; Wahed, A.F.M.A; Haque, Muhammad E.

doi:10.1016/s0921-4534(03)00868-2

Cited by 12 publications

(5 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This value of T c is remarkably lower than theoretically predicted value of 59 K [8]. In fact the mechanical behavior of AgB2 was studied as a function of pressure in comparison to MgB 2 superconductor [10]. AgB2 was found to be a much more tightly packed incompressible material compared to MgB 2 .…”

Section: Introductionmentioning

confidence: 80%

A COMPARISON OF THE RESISTIVITY BEHAVIOR OF MgB₂, AlB₂ AND AgB₂ SYSTEMS

et al. 2006

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 80%

A COMPARISON OF THE RESISTIVITY BEHAVIOR OF MgB₂, AlB₂ AND AgB₂ SYSTEMS

et al. 2006

View full text Add to dashboard Cite

show abstract

“…[3][4][5][6][7] In addition, AgB 2 and AuB 2 were predicted to have T c higher than 50 K from the theoretical estimates, 8,9 but recently much lower T c $ 7 K than theoretically predicted was found experimentally in AgB 2 thin films. 10 It should also be noted that, despite a favorable prediction of their high T c , [11][12][13][14] it is difficult to synthesize these materials with an AlB 2 structure.…”

Section: Introductionmentioning

confidence: 92%

Critical current density and flux pinning in Zr0.96V0.04B2 superconductor with AlB2 structure

Jung

Vanacken

Moshchalkov

et al. 2013

Journal of Applied Physics

View full text Add to dashboard Cite

We have investigated the critical current density (Jc) and the flux pinning behavior in Zr0.96V0.04B2 superconductor with an AlB2 structure. V substitutions in Zr sites of non-superconducting ZrB2 system lead to superconductivity, and the 4% V-substituted Zr0.96V0.04B2 compounds show the highest superconducting transition temperature (Tc) of ∼8.7 K. The magnetic hysteresis (M−H) loops for the Zr0.96V0.04B2 demonstrate type-II superconducting behavior in a broad temperature range, and the Jc is estimated from the M−H loops using the Bean model. The analysis of the double-logarithmic Jc(H) plots indicates the dominance of collective pinning in Zr0.96V0.04B2, and that Jc(H) and magnetic field dependences of the flux pinning force density (Fp) are well fitted by the double exponential model which takes into account the existence of two superconducting gaps.

show abstract

“…Since the discovery of superconductivity in MgB 2 there have been many theoretical studies of this system ,,,− as well as of chemically related systems such as AlB 2 and Mg 1− x Al x B 2 . ,,,,, Most of these studies have focused on establishing first-principles based models for the high superconducting transition temperature in MgB 2 , which involves calculating elastic properties, phonon spectra, and the electronic structure, as well as the coupling between phonons and electrons within BCS-like frameworks. To the best of our knowledge, there are no studies of MgB 2 or other transition metal borides based on simulations using semiempirical potentials and, partially for this reason, there are no theoretical investigations of extended defects in MgB 2 or in particular Mg 1− x Al x B 2 where the distribution of Al is known to create nonstandard behavior.…”

Section: Introductionmentioning

confidence: 99%

“…Since the discovery of superconductivity in MgB 2 there have been many theoretical studies of this system 10,15,16,[43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58] as well as of chemically related systems such as AlB 2 and Mg 1-x Al x B 2 . 16,44,45,50,51,58 Most of these studies have focused on establishing first-principles based models for the high superconducting transition temperature in MgB 2 , which involves calculating elastic properties, phonon spectra, and the electronic structure, as well as the coupling between phonons and electrons within BCS-like frameworks.…”

Section: Introductionmentioning

confidence: 99%

Modeling of the Phase Evolution in Mg_1−xAl_xB₂ (0 < x < 0.5) and Its Experimental Signatures

et al. 2009

View full text Add to dashboard Cite

USA andersson @Ianl.gov RECEIVED DATE CORRESPONDING AUTHOR FOOTNOTEDespite the chemical and structural simplicity of MgB2' at 39 K this compound has the highest known Tc of any binary compound. Electron doping by substituting Al for Mg leads to decreasing Tc and the observed concentration dependent rate of decrease has been proposed to arise from the non-ideal character of MgB2-AIB2 solid solutions, which derives from the existence of an ordered M~.sAlo.sB2 compound. Heterogeneous nano-scale structure patterns in solid solutions have emerged as an important concept for complex materials, ranging from actinide alloys and oxides to high-temperature cuprate superconductors and mallganite-based materials exhibiting colossal magnetoresistivity. In this work we investigate the formation of structural heterogeneities in Mg 1 . ,AI.B2' which take the form of nano-scale AI-AI and AI-Mg domains of different geometry and size, using molecular statics/dynamics simulations and in particular we study the corresponding signatures in diffraction experiments. In order to undertake this task we first derive appropriate 1 Mg-AI-B semi-empirical potentials within the Modified Embedded Atom Method formalism.These potentials are also applied to explore the equilibrium Mg 1 _ x Al x B 2 phase diagram for 0 < x < 0.5. Additionally, density functional theory calculations were utilized to study the influence of heterogeneities on the electronic structure and charge distribution in Mg 1 _ x AI.B 2 • KEYWORDS

show abstract

Mechanical behaviour of AgB2 in comparison to MgB2––a first principle study

Cited by 12 publications

References 22 publications

A COMPARISON OF THE RESISTIVITY BEHAVIOR OF MgB₂, AlB₂ AND AgB₂ SYSTEMS

A COMPARISON OF THE RESISTIVITY BEHAVIOR OF MgB₂, AlB₂ AND AgB₂ SYSTEMS

Critical current density and flux pinning in Zr0.96V0.04B2 superconductor with AlB2 structure

Modeling of the Phase Evolution in Mg_1−xAl_xB₂ (0 < x < 0.5) and Its Experimental Signatures

Contact Info

Product

Resources

About

Mechanical behaviour of AgB2 in comparison to MgB2––a first principle study

Cited by 12 publications

References 22 publications

A COMPARISON OF THE RESISTIVITY BEHAVIOR OF MgB2, AlB2 AND AgB2 SYSTEMS

A COMPARISON OF THE RESISTIVITY BEHAVIOR OF MgB2, AlB2 AND AgB2 SYSTEMS

Critical current density and flux pinning in Zr0.96V0.04B2 superconductor with AlB2 structure

Modeling of the Phase Evolution in Mg1−xAlxB2 (0 < x < 0.5) and Its Experimental Signatures

Contact Info

Product

Resources

About

A COMPARISON OF THE RESISTIVITY BEHAVIOR OF MgB₂, AlB₂ AND AgB₂ SYSTEMS

A COMPARISON OF THE RESISTIVITY BEHAVIOR OF MgB₂, AlB₂ AND AgB₂ SYSTEMS

Modeling of the Phase Evolution in Mg_1−xAl_xB₂ (0 < x < 0.5) and Its Experimental Signatures