Magneto-transport properties of dilute granular ferromagnets

A. Cohen; A. Frydman; R. Berkovits

doi:10.1016/j.ssc.2003.10.028

Magneto-transport properties of dilute granular ferromagnets

A. Cohen, A. Frydman, R. Berkovits

Department of Physics

Bar-Ilan University

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

We present magnetoresistance (MR) measurements performed on quench-condensed granular Ni thin films which are on the verge of electric continuity. In these systems, the electric conductivity is believed to be governed by the resistance between a very small number of grains. The films exhibit sharp resistance jumps as a function of magnetic field. We interpret these findings as being the result of magneto-mechanical distortions that occur in single grains which act as bottlenecks in the dilute percolation network. The observed features provide a unique measure of magnetostriction effects in nano-grain structures as well as being able to shed light on some of the properties of regular granular magnetic films.

Original language	English
Pages (from-to)	291-296
Number of pages	6
Journal	Solid State Communications
Volume	129
Issue number	5
DOIs	https://doi.org/10.1016/j.ssc.2003.10.028
State	Published - Feb 2004

Bibliographical note

Funding Information:
We gratefully acknowledge illuminating discussions with R.C. Dynes, Z. Ovadyahu and M. Pollak. This research was supported by the Israeli Academy of Science.

Funding

We gratefully acknowledge illuminating discussions with R.C. Dynes, Z. Ovadyahu and M. Pollak. This research was supported by the Israeli Academy of Science.

Funders	Funder number
Israeli Academy of Science

Keywords

A. Granular ferromagnets
B. Quench condensation
D. Giant magnetoresistance
D. Magnetostriction

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10.1016/j.ssc.2003.10.028

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title = "Magneto-transport properties of dilute granular ferromagnets",

abstract = "We present magnetoresistance (MR) measurements performed on quench-condensed granular Ni thin films which are on the verge of electric continuity. In these systems, the electric conductivity is believed to be governed by the resistance between a very small number of grains. The films exhibit sharp resistance jumps as a function of magnetic field. We interpret these findings as being the result of magneto-mechanical distortions that occur in single grains which act as bottlenecks in the dilute percolation network. The observed features provide a unique measure of magnetostriction effects in nano-grain structures as well as being able to shed light on some of the properties of regular granular magnetic films.",

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AU - Cohen, A.

AU - Frydman, A.

AU - Berkovits, R.

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N2 - We present magnetoresistance (MR) measurements performed on quench-condensed granular Ni thin films which are on the verge of electric continuity. In these systems, the electric conductivity is believed to be governed by the resistance between a very small number of grains. The films exhibit sharp resistance jumps as a function of magnetic field. We interpret these findings as being the result of magneto-mechanical distortions that occur in single grains which act as bottlenecks in the dilute percolation network. The observed features provide a unique measure of magnetostriction effects in nano-grain structures as well as being able to shed light on some of the properties of regular granular magnetic films.

AB - We present magnetoresistance (MR) measurements performed on quench-condensed granular Ni thin films which are on the verge of electric continuity. In these systems, the electric conductivity is believed to be governed by the resistance between a very small number of grains. The films exhibit sharp resistance jumps as a function of magnetic field. We interpret these findings as being the result of magneto-mechanical distortions that occur in single grains which act as bottlenecks in the dilute percolation network. The observed features provide a unique measure of magnetostriction effects in nano-grain structures as well as being able to shed light on some of the properties of regular granular magnetic films.

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Magneto-transport properties of dilute granular ferromagnets

Abstract

Bibliographical note

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Keywords

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