Properties of single RuO2 layer embedded in SrTiO3

T. Harada, C. R. Hughes, R. Ashoori, A.V. Boris, H. Hilgenkamp, M. E. Holtz, L. Li, J. Mannhart, D. A. Muller, D.G. Schlom, A. Soukiassian, X. Wang, H. Boschker

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

A two-dimensional ferromagnet is an interesting system both for basic understanding of magnetism and for spintronic applications. However, making such a system is not easy as ferromagnetism becomes more and more unstable with reducing the thickness of a ferromagnet. For example, in oxide systems such as SrRuO3, La1-xSrxMnO3, etc, ferromagnetism is lost around the thickness of a few unit cells [1, 2]. Recent theoretical studies have shown that a single SrRuO3 layer can exhibit half-metallicity when it is sandwiched between SrTiO3 lattices [3, 4]. The conduction electrons are predicted to exist only in RuO2 layers, which means that the system is a two-dimensional half-metal. In this work, in order to demonstrate the theoretical prediction, we have fabricated high-quality SrRuO3/SrTiO3 superlattices using molecular beam epitaxy. Magnetic and transport measurements show a clear signature of ferromagnetism and conductivity.

Original languageEnglish
Title of host publication2015 IEEE International Magnetics Conference, INTERMAG 2015
PublisherIEEE
ISBN (Electronic)9781479973224
DOIs
Publication statusPublished - 14 Jul 2015

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Ferromagnetism
Magnetoelectronics
Superlattices
Magnetism
Molecular beam epitaxy
Oxides
Metals
Electrons
strontium titanium oxide

Cite this

Harada, T., Hughes, C. R., Ashoori, R., Boris, A. V., Hilgenkamp, H., Holtz, M. E., ... Boschker, H. (2015). Properties of single RuO2 layer embedded in SrTiO3. In 2015 IEEE International Magnetics Conference, INTERMAG 2015 [7157250] IEEE. https://doi.org/10.1109/INTMAG.2015.7157250
Harada, T. ; Hughes, C. R. ; Ashoori, R. ; Boris, A.V. ; Hilgenkamp, H. ; Holtz, M. E. ; Li, L. ; Mannhart, J. ; Muller, D. A. ; Schlom, D.G. ; Soukiassian, A. ; Wang, X. ; Boschker, H. / Properties of single RuO2 layer embedded in SrTiO3. 2015 IEEE International Magnetics Conference, INTERMAG 2015. IEEE, 2015.
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title = "Properties of single RuO2 layer embedded in SrTiO3",
abstract = "A two-dimensional ferromagnet is an interesting system both for basic understanding of magnetism and for spintronic applications. However, making such a system is not easy as ferromagnetism becomes more and more unstable with reducing the thickness of a ferromagnet. For example, in oxide systems such as SrRuO3, La1-xSrxMnO3, etc, ferromagnetism is lost around the thickness of a few unit cells [1, 2]. Recent theoretical studies have shown that a single SrRuO3 layer can exhibit half-metallicity when it is sandwiched between SrTiO3 lattices [3, 4]. The conduction electrons are predicted to exist only in RuO2 layers, which means that the system is a two-dimensional half-metal. In this work, in order to demonstrate the theoretical prediction, we have fabricated high-quality SrRuO3/SrTiO3 superlattices using molecular beam epitaxy. Magnetic and transport measurements show a clear signature of ferromagnetism and conductivity.",
author = "T. Harada and Hughes, {C. R.} and R. Ashoori and A.V. Boris and H. Hilgenkamp and Holtz, {M. E.} and L. Li and J. Mannhart and Muller, {D. A.} and D.G. Schlom and A. Soukiassian and X. Wang and H. Boschker",
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Harada, T, Hughes, CR, Ashoori, R, Boris, AV, Hilgenkamp, H, Holtz, ME, Li, L, Mannhart, J, Muller, DA, Schlom, DG, Soukiassian, A, Wang, X & Boschker, H 2015, Properties of single RuO2 layer embedded in SrTiO3. in 2015 IEEE International Magnetics Conference, INTERMAG 2015., 7157250, IEEE. https://doi.org/10.1109/INTMAG.2015.7157250

Properties of single RuO2 layer embedded in SrTiO3. / Harada, T.; Hughes, C. R.; Ashoori, R.; Boris, A.V.; Hilgenkamp, H.; Holtz, M. E.; Li, L.; Mannhart, J.; Muller, D. A.; Schlom, D.G.; Soukiassian, A.; Wang, X.; Boschker, H.

2015 IEEE International Magnetics Conference, INTERMAG 2015. IEEE, 2015. 7157250.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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AU - Holtz, M. E.

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AU - Muller, D. A.

AU - Schlom, D.G.

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AU - Boschker, H.

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AB - A two-dimensional ferromagnet is an interesting system both for basic understanding of magnetism and for spintronic applications. However, making such a system is not easy as ferromagnetism becomes more and more unstable with reducing the thickness of a ferromagnet. For example, in oxide systems such as SrRuO3, La1-xSrxMnO3, etc, ferromagnetism is lost around the thickness of a few unit cells [1, 2]. Recent theoretical studies have shown that a single SrRuO3 layer can exhibit half-metallicity when it is sandwiched between SrTiO3 lattices [3, 4]. The conduction electrons are predicted to exist only in RuO2 layers, which means that the system is a two-dimensional half-metal. In this work, in order to demonstrate the theoretical prediction, we have fabricated high-quality SrRuO3/SrTiO3 superlattices using molecular beam epitaxy. Magnetic and transport measurements show a clear signature of ferromagnetism and conductivity.

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Harada T, Hughes CR, Ashoori R, Boris AV, Hilgenkamp H, Holtz ME et al. Properties of single RuO2 layer embedded in SrTiO3. In 2015 IEEE International Magnetics Conference, INTERMAG 2015. IEEE. 2015. 7157250 https://doi.org/10.1109/INTMAG.2015.7157250