An ab initio scheme is developed, and first-principles calculations are performed, to investigate ferromagnetism in BiFeO3 (BFO) thick and ultrathin films. These systems all possess a weak magnetization that results from a spin canting (that is induced by the tilting of the oxygen octahedra) and that increases from 0 to similar or equal to 0.027 mu(B) as the temperature is decreased below the Neel temperature. Such findings contradict a suggestion that the coupling between magnetic dipoles and mismatch strain leads to the previously reported large values for the magnetization in BFO films. This spin canting is also found to be essential for the linear magnetoelectric effect to occur.
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Univ Paris Saclay, CNRS, CEA Saclay, SPEC,CEA, F-91191 Gif Sur Yvette, FranceUniv Paris Saclay, CNRS, CEA Saclay, SPEC,CEA, F-91191 Gif Sur Yvette, France
Li, Z.
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Chirac, T.
Tranchida, J.
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CEA, SESC, DEC, DES,IRESNE,LM2C, F-13108 St Paul Les Durance, FranceUniv Paris Saclay, CNRS, CEA Saclay, SPEC,CEA, F-91191 Gif Sur Yvette, France
Tranchida, J.
Garcia, V.
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Univ Paris Saclay, Unite Mixte Phys, Thales, CNRS, F-91767 Palaiseau, FranceUniv Paris Saclay, CNRS, CEA Saclay, SPEC,CEA, F-91191 Gif Sur Yvette, France
Garcia, V.
Fusil, S.
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Univ Paris Saclay, Unite Mixte Phys, Thales, CNRS, F-91767 Palaiseau, FranceUniv Paris Saclay, CNRS, CEA Saclay, SPEC,CEA, F-91191 Gif Sur Yvette, France
Fusil, S.
Jacques, V.
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Univ Montpellier, Lab Charles Coulomb, F-34095 Montpellier, France
CNRS, F-34095 Montpellier, FranceUniv Paris Saclay, CNRS, CEA Saclay, SPEC,CEA, F-91191 Gif Sur Yvette, France
Jacques, V.
Chauleau, J. -Y.
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Univ Paris Saclay, CNRS, CEA Saclay, SPEC,CEA, F-91191 Gif Sur Yvette, FranceUniv Paris Saclay, CNRS, CEA Saclay, SPEC,CEA, F-91191 Gif Sur Yvette, France
Chauleau, J. -Y.
Viret, M.
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Univ Paris Saclay, CNRS, CEA Saclay, SPEC,CEA, F-91191 Gif Sur Yvette, FranceUniv Paris Saclay, CNRS, CEA Saclay, SPEC,CEA, F-91191 Gif Sur Yvette, France
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Univ New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, AustraliaUniv New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia
Burns, Stuart R.
Sando, Daniel
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Univ New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, AustraliaUniv New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia
Sando, Daniel
Xu, Bin
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Univ Arkansas, Dept Phys, Fayetteville, AR 72701 USA
Univ Arkansas, Inst Nanosci & Engn, Fayetteville, AR 72701 USA
Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R ChinaUniv New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia
Xu, Bin
Dupe, Bertrand
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Johannes Gutenberg Univ Mainz, Inst Phys, INSPIRE Grp, D-55128 Mainz, GermanyUniv New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia
Dupe, Bertrand
Russell, Lachlan
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Univ New South Wales, Sch Phys, Sydney, NSW 2052, AustraliaUniv New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia
Russell, Lachlan
Deng, Guochu
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Australian Nucl Sci & Technol Org, Lucas Heights, NSW 2234, AustraliaUniv New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia
Deng, Guochu
Clements, Richard
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Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia
Australian Nucl Sci & Technol Org, Lucas Heights, NSW 2234, AustraliaUniv New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia
Clements, Richard
Paull, Oliver H. C.
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Univ New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, AustraliaUniv New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia
Paull, Oliver H. C.
Seidel, Jan
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Univ New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, AustraliaUniv New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia
Seidel, Jan
Bellaiche, Laurent
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Univ Arkansas, Dept Phys, Fayetteville, AR 72701 USA
Univ Arkansas, Inst Nanosci & Engn, Fayetteville, AR 72701 USAUniv New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia
Bellaiche, Laurent
Valanoor, Nagarajan
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Univ New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, AustraliaUniv New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia
Valanoor, Nagarajan
Ulrich, Clemens
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Univ New South Wales, Sch Phys, Sydney, NSW 2052, AustraliaUniv New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia