Normal and inverse bulk spin valve effects in single-crystal ruthenates

Jin Peng, J. Hu, X. M. Gu, G. T. Zhou, J. Y. Liu, F. M. Zhang, X. S. Wu, Z. Q. Mao

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The current-perpendicular-to-plane magnetoresistivity (CPP-MR) /ρc(B) is investigated in single crystal ruthenates Ca3(Ru1-xTix)2O7 (x = 0.02). This material is naturally composed of ferromagnetic metallic bilayers (Ru,Ti)O2 separated by nonmagnetic insulating layers of Ca2O2, resulting in tunneling magnetoresistivity. Non-monotonic ρc(B) curves as well as the inverse spin valve effect are observed around the magnetic phase transition associating with the metal-to-insulator transition. A spin dependent tunneling model with alternate distribution of hard and soft magnetic layers [(Ru,Ti)O2] is proposed to explain the exotic CPP-MR behavior. This eccentric CPP-MR behavior highlights the strong spin-charge coupling in double-layered ruthenates and provides a potential material for spintronic devices.

Original languageEnglish (US)
Article number162402
JournalApplied Physics Letters
Volume108
Issue number16
DOIs
StatePublished - Apr 18 2016

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magnetoresistivity
single crystals
eccentrics
insulators
curves
metals

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Peng, J., Hu, J., Gu, X. M., Zhou, G. T., Liu, J. Y., Zhang, F. M., ... Mao, Z. Q. (2016). Normal and inverse bulk spin valve effects in single-crystal ruthenates. Applied Physics Letters, 108(16), [162402]. https://doi.org/10.1063/1.4947489
Peng, Jin ; Hu, J. ; Gu, X. M. ; Zhou, G. T. ; Liu, J. Y. ; Zhang, F. M. ; Wu, X. S. ; Mao, Z. Q. / Normal and inverse bulk spin valve effects in single-crystal ruthenates. In: Applied Physics Letters. 2016 ; Vol. 108, No. 16.
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Peng, J, Hu, J, Gu, XM, Zhou, GT, Liu, JY, Zhang, FM, Wu, XS & Mao, ZQ 2016, 'Normal and inverse bulk spin valve effects in single-crystal ruthenates', Applied Physics Letters, vol. 108, no. 16, 162402. https://doi.org/10.1063/1.4947489

Normal and inverse bulk spin valve effects in single-crystal ruthenates. / Peng, Jin; Hu, J.; Gu, X. M.; Zhou, G. T.; Liu, J. Y.; Zhang, F. M.; Wu, X. S.; Mao, Z. Q.

In: Applied Physics Letters, Vol. 108, No. 16, 162402, 18.04.2016.

Research output: Contribution to journalArticle

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AU - Peng, Jin

AU - Hu, J.

AU - Gu, X. M.

AU - Zhou, G. T.

AU - Liu, J. Y.

AU - Zhang, F. M.

AU - Wu, X. S.

AU - Mao, Z. Q.

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AB - The current-perpendicular-to-plane magnetoresistivity (CPP-MR) /ρc(B) is investigated in single crystal ruthenates Ca3(Ru1-xTix)2O7 (x = 0.02). This material is naturally composed of ferromagnetic metallic bilayers (Ru,Ti)O2 separated by nonmagnetic insulating layers of Ca2O2, resulting in tunneling magnetoresistivity. Non-monotonic ρc(B) curves as well as the inverse spin valve effect are observed around the magnetic phase transition associating with the metal-to-insulator transition. A spin dependent tunneling model with alternate distribution of hard and soft magnetic layers [(Ru,Ti)O2] is proposed to explain the exotic CPP-MR behavior. This eccentric CPP-MR behavior highlights the strong spin-charge coupling in double-layered ruthenates and provides a potential material for spintronic devices.

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Peng J, Hu J, Gu XM, Zhou GT, Liu JY, Zhang FM et al. Normal and inverse bulk spin valve effects in single-crystal ruthenates. Applied Physics Letters. 2016 Apr 18;108(16). 162402. https://doi.org/10.1063/1.4947489