Synthesis and magnetic property of the perovskite Bi1−Sr MnO3 thin film

Ohshima, Etsuo; Saya, Yuko; Nantoh, Masashi; Kawai, Maki

doi:10.1016/s0038-1098(00)00283-0

Cited by 40 publications

(36 citation statements)

References 10 publications

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“…In agreement with previous reports on BMO films, 17,18,20,21 magnetization measurements reveal that the films have a fairly reduced moment with respect to the bulk value. We find that this moment is clearly related to changes in the unit-cell volume rather than to strain effects.…”

Section: Introductionsupporting

confidence: 92%

“…14 A few groups have reported on the growth and magnetic properties of BMO in thin-film form. 6,[17][18][19][20][21] Particularly puzzling is the recurrent observation of a reduced magnetization in BMO films compared to bulk, which has been tentatively ascribed to strain effects. 18,20 Yet, none of these studies have addressed the issue of the reduced magnetization of the samples after a detailed structural and compositional characterization.…”

Section: Introductionmentioning

confidence: 99%

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Growth and magnetic properties of multiferroicLaxBi1−xMnO3thin films

et al. 2007

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A comparative study of La x Bi 1−x MnO 3 thin films grown on SrTiO 3 substrates is reported. It is shown that these films grow epitaxially in a narrow pressure-temperature range. A detailed structural and compositional characterization of the films is performed within the growth window. The structure and the magnetization of this system are investigated. We find a clear correlation between the magnetization and the unit-cell volume that we ascribe to Bi deficiency and the resultant introduction of a mixed valence on the Mn ions. On these grounds, we show that the reduced magnetization of La x Bi 1−x MnO 3 thin films compared to the bulk can be explained quantitatively by a simple model, taking into account the deviation from nominal composition and the Goodenough-Kanamori-Anderson rules of magnetic interactions.

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Section: Introductionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Growth and magnetic properties of multiferroicLaxBi1−xMnO3thin films

et al. 2007

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“…The magnetization is not saturated even in a field of several teslas. It only reaches 280 emu/ cm 3 at 5 T, and is thus fairly reduced with respect to the bulk 12 ͓M͑5 T͒Ӎ0.52M S bulk ͔, which is consistent with the results of Ohshima et al 20 The slow increase of the magnetization at high field is likely to result from the progressive realignment of canted spins. Both the low magnetization and this canted behavior could be explained by the presence of Bi vacancies that locally disturb the complex orbital ordering essential for the long-range ferromagnetic order in BMO.…”

supporting

confidence: 90%

Spin filtering through ferromagneticBiMnO3tunnel barriers

et al. 2005

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We report on experiments of spin filtering through ultrathin single-crystal layers of the insulating and ferromagnetic oxide BiMnO 3 ͑BMO͒. The spin polarization of the electrons tunneling from a gold electrode through BMO is analyzed with a counterelectrode of the half-metallic oxide La 2/3 Sr 1/3 MnO 3 ͑LSMO͒. At 3 K we find a 50% change of the tunnel resistances according to whether the magnetizations of BMO and LSMO are parallel or opposite. This effect corresponds to a spin-filtering efficiency of up to 22%. Our results thus show the potential of complex ferromagnetic insulating oxides for spin filtering and injection.

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“…Moreover, the magnetic structure at the surface of BiMnO 3 may also be different from the one in the bulk. Indeed, the saturation magnetization of the BiMnO 3 thin films grown on the (100) SrTiO 3 substrate was only 2.8 µ B [58], which is considerably smaller than the bulk value. The magnetic moment increases almost linearly with increasing film thickness and reaches a nearly saturated value at around 500 Å.…”

Section: Implications For the Properties Of Bimnomentioning

confidence: 87%

“…The magnetic moment increases almost linearly with increasing film thickness and reaches a nearly saturated value at around 500 Å. The use of the (110) SrTiO 3 substrate yields even smaller saturation moment (about 1.8 µ B [58]). Thus, all these data suggest that the magnetic ground state realized in the thin films of BiMnO 3 is not the pure FM one, and may contain some elements of the AFM structure.…”

Section: Implications For the Properties Of Bimnomentioning

confidence: 99%

Orbital ordering and magnetic interactions in BiMnO₃

Solovyev

Pchelkina

2008

New J. Phys.

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Abstract. This work is devoted to the analysis of the orbital ordering patterns and associated interatomic magnetic interactions in the centrosymmetric monoclinic structures of BiMnO 3 , which have been recently determined experimentally. First, we set up an effective lattice fermion model for the manganese 3d bands and derive parameters of this model from first-principles electronic structure calculations. Then, we solve this model in terms of the mean-field Hartree-Fock method and obtain parameters of interatomic magnetic interactions between Mn ions. We argue that although the nearest-neighbor interactions favor the ferromagnetism, they compete with the longer range antiferromagnetic (AFM) interactions, the existence of which is directly related to the peculiar geometry of the orbital ordering pattern realized in BiMnO 3 below 474 K. These AFM interactions favor an AFM alignment, which breaks the inversion symmetry. The formation of the AFM phase is additionally assisted by the orbital degrees of freedom, which tend to adjust the nearest-neighbor magnetic interactions in the direction which further stabilizes this phase. We propose that the multiferroelectric behavior, which was observed in BiMnO 3 , may be related to the emergence of the AFM phase under certain conditions.

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Synthesis and magnetic property of the perovskite Bi1−Sr MnO3 thin film

Cited by 40 publications

References 10 publications

Growth and magnetic properties of multiferroicLaxBi1−xMnO3thin films

Growth and magnetic properties of multiferroicLaxBi1−xMnO3thin films

Spin filtering through ferromagneticBiMnO3tunnel barriers

Orbital ordering and magnetic interactions in BiMnO₃

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Synthesis and magnetic property of the perovskite Bi1−Sr MnO3 thin film

Cited by 40 publications

References 10 publications

Growth and magnetic properties of multiferroicLaxBi1−xMnO3thin films

Growth and magnetic properties of multiferroicLaxBi1−xMnO3thin films

Spin filtering through ferromagneticBiMnO3tunnel barriers

Orbital ordering and magnetic interactions in BiMnO3

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Orbital ordering and magnetic interactions in BiMnO₃