]> BibSonomy publications for /author/Zapperi http://www.bibsonomy.org/burst/author/Zapperi BibSonomy BuRST Feed for /author/Zapperi 2008-07-27T02:47:55+02:00 Stochastic dynamics of a sheared granular medium http://www.bibsonomy.org/bibtex/2269860703e31dd83cdb44e6a0d22d30b/andreab andreab 2008-06-12T16:57:16+02:00 2008 distribution extreme friction granular imported myown proceeding statphys stress universality
Stochastic dynamics of a sheared granular medium
A. Petri and A. Baldassarri and F. Dalton and G. Pontuale and L. Pietronero and S. Zapperi The European Physical Journal B - Condensed Matter and Complex Systems (2008)
to 2008 distribution extreme friction granular imported myown proceeding statphys stress universality by andreab on 2008-06-12 16:57:16 ]]> The European Physical Journal B - Condensed Matter and Complex SystemsStochastic dynamics of a sheared granular medium20082008 distribution extreme friction granular imported myown proceeding statphys stress universality 2008-06-12 16:57:16.0Abstract. We experimentally investigate the response of a sheared granular medium in a Couette geometry. The apparatus exhibits the expected stick-slip motion and we probe it in the very intermittent regime resulting from low driving. Statistical analysis of the dynamic fluctuations reveals notable regularities. We observe a possible stability property for the torque distribution, reminiscent of the stability of Gaussian independent variables. In this case, however, the variables are correlated and the distribution is skewed. Moreover, the whole dynamical intermittent regime can be described with a simple stochastic model, finding good quantitative agreement with the experimental data. Interestingly, a similar model has been previously introduced in the study of magnetic domain wall motion, a source of Barkhausen noise. Our study suggests interesting connections between different complex phenomena and reveals some unexpected features that remain to be explained. Analysis of damage clusters in fracture processes Physica Ahttp://www.bibsonomy.org/bibtex/2d9c6570b1ee85b0c0630439db5cef0eb/smicha smicha 2008-04-22T10:36:30+02:00 Fracture and cracks
Analysis of damage clusters in fracture processes
Stefano Zapperi and Purusattam Ray and H. Eugene Stanley and Alessandro Vespignani Physica A: Statistical Mechanics and its Applications 270 57--62 (1999)
to Fracture and cracks by smicha on 2008-04-22 10:36:30 ]]> Physica A: Statistical Mechanics and its ApplicationsAug1-257--62Analysis of damage clusters in fracture processes2701999Fracture and cracks 012008-04-22 10:36:30.0 Crack avalanches in the three-dimensional random fuse model Physica Ahttp://www.bibsonomy.org/bibtex/24cdc7d8ab46547d66183522587f164b5/smicha smicha 2008-04-22T10:36:30+02:00 Fracture
Crack avalanches in the three-dimensional random fuse model
Stefano Zapperi and Phani Kumar V. V. Nukala and Sr?an Simunovic Physica A: Statistical Mechanics and its Applications 357 129--133 (2005)
to Fracture by smicha on 2008-04-22 10:36:30 ]]> Physica A: Statistical Mechanics and its ApplicationsNov1129--133Crack avalanches in the three-dimensional random fuse model3572005Fracture 012008-04-22 10:36:30.0 Vortex nucleation and flux front propagation in type II superconductors Physica Ahttp://www.bibsonomy.org/bibtex/27c16d48ede14966834185260fe12a08a/smicha smicha 2008-04-22T10:36:30+02:00 Flux dynamics lattice line
Vortex nucleation and flux front propagation in type II superconductors
Stefano Zapperi and Jos{\'e} S. Andrade and Andr{\'e} A. Moreira Physica A: Statistical Mechanics and its Applications 342 383--387 (2004)
to Flux dynamics lattice line by smicha on 2008-04-22 10:36:30 ]]> Physica A: Statistical Mechanics and its ApplicationsOct1-2383--387Vortex nucleation and flux front propagation in type II superconductors3422004Flux dynamics lattice line 152008-04-22 10:36:30.0 Complex dynamics of magnetic domain walls Physica Ahttp://www.bibsonomy.org/bibtex/239bbb03cb9835843e8e003b62c0ca0db/smicha smicha 2008-04-22T10:36:30+02:00 Barkhausen noise
Complex dynamics of magnetic domain walls
G. Durin and S. Zapperi Physica A: Statistical Mechanics and its Applications 314 230--234 (2002)
to Barkhausen noise by smicha on 2008-04-22 10:36:30 ]]> Physica A: Statistical Mechanics and its ApplicationsNov1-4230--234Complex dynamics of magnetic domain walls3142002Barkhausen noise 012008-04-22 10:36:30.0 Complex dynamics of magnetic domain walls ScienceDirect - Physica A: Statistical Mechanics and its Applications : Complex dynamics of magnetic domain wallshttp://www.bibsonomy.org/bibtex/239bbb03cb9835843e8e003b62c0ca0db/francescafran francescafran 2008-03-20T18:35:47+01:00 Barkhausen Domain Soft dynamics magnetic materials noise wall
Complex dynamics of magnetic domain walls
G. Durin and S. Zapperi Physica A: Statistical Mechanics and its Applications 314 230--234 (2002)
to Barkhausen Domain Soft dynamics magnetic materials noise wall by francescafran on 2008-03-20 18:35:47 ]]> Physica A: Statistical Mechanics and its Applications#nov#1-4230--234Complex dynamics of magnetic domain walls3142002Barkhausen Domain Soft dynamics magnetic materials noise wall 2008-03-20 18:35:47.0We resume the recent theoretical and experimental results which point towards a deeper comprehension of the complex dynamics of magnetic domain walls, i.e., the Barkhausen noise. In particular, we show how the theoretical framework of depinning transition is able to correctly describe the various experimental scaling exponents, included the power spectral exponent which has been investigated without success since the earlier papers. Signature of negative domain wall mass in soft magnetic materials ScienceDirect - Journal of Magnetism and Magnetic Materials : Signature of negative domain wall mass in soft magnetic materialshttp://www.bibsonomy.org/bibtex/2c2f11f6a501158c06555b6843d87ff36/francescafran francescafran 2008-03-20T18:35:28+01:00 Barkhausen Critical Hysteresis noise phenomena
Signature of negative domain wall mass in soft magnetic materials
G. Durin and F. Colaiori and C. Castellano and S. Zapperi Journal of Magnetism and Magnetic Materials 316 436--441 (2007)
to Barkhausen Critical Hysteresis noise phenomena by francescafran on 2008-03-20 18:35:28 ]]> Proceedings of the Joint European Magnetic SymposiaJournal of Magnetism and Magnetic Materials#sep#2436--441Signature of negative domain wall mass in soft magnetic materials3162007Barkhausen Critical Hysteresis noise phenomena 2008-03-20 18:35:28.0Magnetic properties of ferromagnetic materials often originate from domain wall motion, involving different damping mechanisms, an effective mass and various interactions with the surrounding media. In metallic materials, eddy current damping overwhelms inertia and thus the effect of the mass is usually neglected. We have recently reported experimental evidence that in soft metallic ferromagnets eddy currents yield an observable negative contribution to the effective domain wall mass. The weight of this mass is of the order of 10-5 kg/m2, much larger than the positive Doring mass (~10-9 kg/m2). This negative effective mass is responsible for the leftward asymmetry of Barkhausen noise pulse shapes. In particular, this asymmetry depends on the pulse duration and it is found to encode important information on the characteristic time of the underlying domain wall dynamics. Only on long timescales the pulse shapes are symmetric and show the universal features typical of the Barkhausen effect. This result clarifies the general significance of pulse shape asymmetry commonly observed in systems showing a similar crackling noise, and contributes to better understand the microscopic phenomena responsible of magnetic hysteresis. New perspectives for the Barkhausen effect barkhausenhttp://www.bibsonomy.org/bibtex/24eefa1dfa12abbe8528f23d160de9016/francescafran francescafran 2008-03-20T18:09:06+01:00 barkhausen
New perspectives for the Barkhausen effect
S. Zapperi and G. Durin Comp. Mat. Sci. 20 436 (2001)
to barkhausen by francescafran on 2008-03-20 18:09:06 ]]> Comp. Mat. Sci.436New perspectives for the Barkhausen effect202001barkhausen 2008-03-20 18:09:06.0 Dynamics of a ferromagnetic domain wall: avalanches, depinning transition and the Barkhausen effect barkhausenhttp://www.bibsonomy.org/bibtex/2894c2415ad4b1e028cd2fbc9bec0c64a/francescafran francescafran 2008-03-20T18:09:06+01:00 barkhausen durin zapperi
Dynamics of a ferromagnetic domain wall: avalanches, depinning transition and the Barkhausen effect
S. Zapperi and P. Cizeau and G. Durin and H. E. Stanley Phys. Rev. B 58 6353--6366 (1998)
to barkhausen durin zapperi by francescafran on 2008-03-20 18:09:06 ]]> Phys. Rev. B6353--6366Dynamics of a ferromagnetic domain wall: avalanches, depinning transition and the Barkhausen effect581998barkhausen durin zapperi 2008-03-20 18:09:06.0 Signature of effective mass in crackling-noise asymmetry barkhausenhttp://www.bibsonomy.org/bibtex/2c7963e30c00e7e9e50b6ff2359f776aa/francescafran francescafran 2008-03-20T18:09:06+01:00 barkhausen
Signature of effective mass in crackling-noise asymmetry
S. Zapperi and C. Castellano and F. Colaiori and G. Durin Nature Phys. 1 46--49 (2005)
to barkhausen by francescafran on 2008-03-20 18:09:06 ]]> Nature Phys.46--49Signature of effective mass in crackling-noise asymmetry12005barkhausen 2008-03-20 18:09:06.0