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16 Apr 2012

Volume 100, Issue 16, Articles (16xxxx)

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Appl. Phys. Lett. 100, 164101 (2012); http://dx.doi.org/10.1063/1.3702579 (4 pages)

Cheol-Ho Yun, Leslie Y. Yeo, James R. Friend, and Bernard Yan
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Vacancy-driven ferromagnetism in ferroelectric PbTiO3

Takahiro Shimada, Yoshitaka Uratani, and Takayuki Kitamura

Appl. Phys. Lett. 100, 162901 (2012); http://dx.doi.org/10.1063/1.4704362 (3 pages) | Cited 3 times

Online Publication Date: 16 April 2012

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The possible origin of ferromagnetism in PbTiO3 containing vacancies is investigated by performing first-principles calculations. We demonstrate that O and Ti vacancies both induce ferromagnetism but by different mechanisms: the ferromagnetism driven by the O vacancy originates from the spin-polarized eg state of the nearest Ti atom, whereas that driven by the Ti vacancy is due to the half-metallic px state of the nearest O atom. The results presented here provide fundamental insights into the design of multiferroics in conventional ferroelectrics.
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75.50.-y Studies of specific magnetic materials
75.85.+t Magnetoelectric effects, multiferroics
61.72.jd Vacancies
75.50.Dd Nonmetallic ferromagnetic materials
77.80.-e Ferroelectricity and antiferroelectricity
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