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Magnetic Ceramics

Alff, Lambert
Riedel, Ralf and Chen, I-Wei (eds.) (2013):
Magnetic Ceramics.
In: Ceramics Science and Technology, Weinheim, Germany, Wiley-VCH Verlag GmbH & Co. KGaA, pp. 495-510, [Online-Edition: http://dx.doi.org/10.1002/9783527631971.ch14],
[Book Section]

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 and Chen, I-Wei
Creators: Alff, Lambert
Title: Magnetic Ceramics
Language: English
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.

Title of Book: Ceramics Science and Technology
Volume: Volume 4: Applications
Place of Publication: Weinheim, Germany
Publisher: Wiley-VCH Verlag GmbH & Co. KGaA
ISBN: 978352731158
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
Official URL: http://dx.doi.org/10.1002/9783527631971.ch14
Identification Number: doi:10.1002/9783527631971.ch14
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