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Magnetic Ceramics

Alff, Lambert
eds.: Riedel, Ralf ; Chen, I-Wei (2013)
Magnetic Ceramics.
In: Ceramics Science and Technology
doi: 10.1002/9783527631971.ch14
Book Section, Bibliographie

Abstract

This chapter focuses on a peculiar property of some magnetic oxides, namely their half-metallicity. Magnetic half-metals are materials which are metallic but in which the charge carriers — that is, the electrons close to the Fermi-level — are fully spin-polarized. It discusses three types of magnetic oxide ceramics, which are indeed half-metals: (i) the well-known magnetite (Fe3O4); (ii) doped manganites, which are famous for their colossal magneto-resistance; and (iii) ferrimagnetic double-perovskites, which allow an enormous degree of materials variation and, thereby, the tuning of their magnetic properties. The chapter briefly talks about the ferrites and nonoxide magnetic ceramics — namely the iron nitrides — as a potential magnetic family of interest in the search for novel, rare-earth-free magnetic materials. It focuses on the future where half-metallic magnetic oxides will play key roles in spintronic applications as magnetic field sensors and memory devices.

Item Type: Book Section
Erschienen: 2013
Editors: Riedel, Ralf ; Chen, I-Wei
Creators: Alff, Lambert
Type of entry: Bibliographie
Title: Magnetic Ceramics
Language: English
Date: 10 July 2013
Place of Publication: Weinheim, Germany
Publisher: Wiley-VCH Verlag GmbH & Co. KGaA
Book Title: Ceramics Science and Technology
Series Volume: Volume 4: Applications
DOI: 10.1002/9783527631971.ch14
Abstract:

This chapter focuses on a peculiar property of some magnetic oxides, namely their half-metallicity. Magnetic half-metals are materials which are metallic but in which the charge carriers — that is, the electrons close to the Fermi-level — are fully spin-polarized. It discusses three types of magnetic oxide ceramics, which are indeed half-metals: (i) the well-known magnetite (Fe3O4); (ii) doped manganites, which are famous for their colossal magneto-resistance; and (iii) ferrimagnetic double-perovskites, which allow an enormous degree of materials variation and, thereby, the tuning of their magnetic properties. The chapter briefly talks about the ferrites and nonoxide magnetic ceramics — namely the iron nitrides — as a potential magnetic family of interest in the search for novel, rare-earth-free magnetic materials. It focuses on the future where half-metallic magnetic oxides will play key roles in spintronic applications as magnetic field sensors and memory devices.

Uncontrolled Keywords: doped manganites, ferrimagnetic double-perovskites, magnetic ceramics, magnetite (Fe3O4), rare-earth-free magnetic materials, spintronic applications
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 09 Jan 2014 09:04
Last Modified: 09 Jan 2014 09:04
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