Efficient Calculation of Low Energy Configurations of Nanoparticle Ensembles for Magnetoresistive Sensor Devices by Means of Stochastic Spin Dynamicsand Monte Carlo Methods

• Authors: L. Teich , C. Schröder , C. Müller , A. Patel , J. Meyer , A. Hütten
• Languages of publication: EN

Abstracts

EN

We present results of Monte Carlo and stochastic spin dynamics simulations of a magnetic nanoparticle model system based on experimentally produced samples. Thermodynamic investigations as well as spin dynamics studies show characteristic features, both resembling magnetic dipole glass behaviour. While spin dynamics studies at T=0 yield a multitude of low energy configurations, thermodynamic simulations show a clear transition between a paramagnetic and a frozen magnetic state. Moreover, we demonstrate the application of experimentally inspired demagnetization protocols to compute low energy configurations of the systems under consideration efficiently.

Keywords

EN

75.40.Mg; 75.75.Jn; 75.78.-n

Discipline

• 75.40.Mg: Numerical simulation studies
• 75.78.-n: Magnetization dynamics
• 75.75.Jn: Dynamics of magnetic nanoparticles

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 127
• Issue: 2
• Pages: 374-376

Dates

published

2015-02

Contributors

author

L. Teich

• Bielefeld Institute for Applied Materials Research, University of Applied Sciences Bielefeld, Wilhelm-Bertelsmann-Str. 10, 33602 Bielefeld, Germany

author

C. Schröder

• Bielefeld Institute for Applied Materials Research, University of Applied Sciences Bielefeld, Wilhelm-Bertelsmann-Str. 10, 33602 Bielefeld, Germany

author

C. Müller

• Department of Engineering Sciences and Mathematics, University of Applied Sciences Bielefeld, Wilhelm-Bertelsmann-Str. 10, 33602 Bielefeld, Germany

author

A. Patel

• Department of Engineering Sciences and Mathematics, University of Applied Sciences Bielefeld, Wilhelm-Bertelsmann-Str. 10, 33602 Bielefeld, Germany

author

J. Meyer

• Department of Physics, Bielefeld University, Universitätsstr. 25, 33615 Bielefeld, Germany

author

A. Hütten

• Department of Physics, Bielefeld University, Universitätsstr. 25, 33615 Bielefeld, Germany

References

• [1] J. Meyer, T. Rempel, M. Schäfers, F. Wittbracht, C. Müller, A.V. Patel, A. Hütten, Smart Mater. Struct. 22, 025032 (2013), doi: 10.1088/0964-1726/22/2/025032
• [2] C. Müller, K. Kraushaar, A. Doebbe, J.H. Mussgnug, O. Kruse, E. Kroke, A.V. Patel, Chem. Commun. 49, 10163 (2013), doi: 10.1039/C3CC45023F
• [3] Z. Boudrikis, J.P. Morgan, J. Akerman, A. Stein, P. Politi, S. Langridge, C.H. Marrows, P.L. Stamps, Phys. Rev. Lett. 109, 037203 (2012), doi: 10.1103/PhysRevLett.109.037203
• [4] L. Engelhardt, C. Schröder, in: Molecular Cluster Magnets, Ed. R.E.P. Winpenny, World Sci., Singapore 2011
• [5] K. Binder, A.P. Young, Rev. Mod. Phys. 58, 801 (1986), doi: 10.1103/RevModPhys.58.801

Identifiers

DOI

10.12693/APhysPolA.127.374