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Himcinschi C, Drechsler F, Walch DS, Bhatnagar A, Belik AA, Kortus J. Unexpected Phonon Behaviour in BiFe xCr 1-xO 3, a Material System Different from Its BiFeO 3 and BiCrO 3 Parents. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:1607. [PMID: 35564316 PMCID: PMC9100047 DOI: 10.3390/nano12091607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/05/2022] [Accepted: 05/05/2022] [Indexed: 02/04/2023]
Abstract
The dielectric function and the bandgap of BiFe0.5Cr0.5O3 thin films were determined from spectroscopic ellipsometry and compared with that of the parent compounds BiFeO3 and BiCrO3. The bandgap value of BiFe0.5Cr0.5O3 is lower than that of BiFeO3 and BiCrO3, due to an optical transition at ~2.27 eV attributed to a charge transfer excitation between the Cr and Fe ions. This optical transition enables new phonon modes which have been investigated using Raman spectroscopy by employing multi-wavelengths excitation. The appearance of a new Raman mode at ~670 cm-1 with a strong intensity dependence on the excitation line and its higher order scattering activation was found for both BiFe0.5Cr0.5O3 thin films and BiFexCr1-xO3 polycrystalline bulk samples. Furthermore, Raman spectroscopy was also used to investigate temperature induced structural phase transitions in BiFe0.3Cr0.7O3.
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Affiliation(s)
- Cameliu Himcinschi
- Institute of Theoretical Physics, TU Bergakademie Freiberg, D-09596 Freiberg, Germany; (F.D.); (J.K.)
| | - Felix Drechsler
- Institute of Theoretical Physics, TU Bergakademie Freiberg, D-09596 Freiberg, Germany; (F.D.); (J.K.)
| | - David Sebastian Walch
- Zentrum für Innovationskompetenz SiLi-nano, Martin-Luther-Universität Halle-Wittenberg, D-06120 Halle (Saale), Germany; (D.S.W.); (A.B.)
- Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, D-06120 Halle (Saale), Germany
| | - Akash Bhatnagar
- Zentrum für Innovationskompetenz SiLi-nano, Martin-Luther-Universität Halle-Wittenberg, D-06120 Halle (Saale), Germany; (D.S.W.); (A.B.)
- Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, D-06120 Halle (Saale), Germany
| | - Alexei A. Belik
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Ibaraki, Tsukuba 305-0044, Japan;
| | - Jens Kortus
- Institute of Theoretical Physics, TU Bergakademie Freiberg, D-09596 Freiberg, Germany; (F.D.); (J.K.)
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2
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Hu Y, Abdelsamie A, Weng Y, Zheng F, Fang L, You L. Effect of polarization rotation on the optical and photovoltaic properties of BiFeO 3thin films. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:354002. [PMID: 34153953 DOI: 10.1088/1361-648x/ac0d19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 06/21/2021] [Indexed: 06/13/2023]
Abstract
Visible-light-active ferroelectric materials are gaining increasing attention due to the unique ferroelectric photovoltaic effect. To boost the light harvesting capability, vast research is devoted to band gap engineering by chemical substitutions, regardless of the side effect on ferroelectric polarization. Here, we focus on how polar order affects the optical and photovoltaic properties. Using BiFeO3as the model system, we induce the polarization rotation by A-site La substitution, which results in continuous reduction of optical anisotropy of the samples, as revealed by the concerted optical characterizations. This further causes the decrease of angular dependence of ferroelectric photovoltaic effect on the light polarization. The results demonstrate the inner connection of the ferroelectric polarization and optical anisotropy via the lattice degree of freedom.
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Affiliation(s)
- Yiqi Hu
- School of Physical Science and Technology, Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, People's Republic of China
| | - Amr Abdelsamie
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Yuyan Weng
- School of Physical Science and Technology, Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, People's Republic of China
| | - Fengang Zheng
- School of Physical Science and Technology, Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, People's Republic of China
| | - Liang Fang
- School of Physical Science and Technology, Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, People's Republic of China
| | - Lu You
- School of Physical Science and Technology, Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, People's Republic of China
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3
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Knoche DS, Steimecke M, Yun Y, Mühlenbein L, Bhatnagar A. Anomalous circular bulk photovoltaic effect in BiFeO 3 thin films with stripe-domain pattern. Nat Commun 2021; 12:282. [PMID: 33436580 PMCID: PMC7804139 DOI: 10.1038/s41467-020-20446-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 12/01/2020] [Indexed: 11/21/2022] Open
Abstract
Multiferroic bismuth ferrite, BiFeO3, offers a vast landscape to study the interplay between different ferrroic orders. Another aspect which is equally exciting, and yet underutilized, is the possibility of large-scale ordering of domains. Along with symmetry-driven bulk photovoltaic effect, BiFeO3 presents opportunities to conceptualize novel light-based devices. In this work, we investigate the evolution of the bulk photovoltaic effect in BiFeO3 thin films with stripe-domain pattern as the polarization of light is modulated from linear to elliptical to circular. The open-circuit voltages under circularly polarized light exceed ± 25 V. The anomalous character of the effect arises from the contradiction with the analytical assessment involving tensorial analysis. The assessment highlights the need for a domain-specific interaction of light which is further analyzed with spatially-resolved Raman measurements. Appropriate positioning of electrodes allows observation of a switch-like photovoltaic effect, i.e., ON and OFF state, by changing the helicity of circularly polarized light. The authors study the evolution of the bulk photovoltaic effect in BiFeO3 thin films with stripe-domains as the polarization of light is modulated from linear to circular. A relationship between the anomalous photo-response and differential light-domain interaction is established.
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Affiliation(s)
- David S Knoche
- Zentrum für Innovationskompetenz SiLi-nano, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), 06120, Germany.,Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), 06120, Germany
| | - Matthias Steimecke
- Institut für Chemie, Technische Chemie, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), 06120, Germany
| | - Yeseul Yun
- Zentrum für Innovationskompetenz SiLi-nano, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), 06120, Germany.,Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), 06120, Germany
| | - Lutz Mühlenbein
- Zentrum für Innovationskompetenz SiLi-nano, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), 06120, Germany.,Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), 06120, Germany
| | - Akash Bhatnagar
- Zentrum für Innovationskompetenz SiLi-nano, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), 06120, Germany. .,Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), 06120, Germany.
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4
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Morrow R, Sturza MI, Ray R, Himcinschi C, Kern J, Schlender P, Richter M, Wurmehl S, Büchner B. Discovery, Crystal Growth, and Characterization of Garnet Eu
2
PbSb
2
Zn
3
O
12. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ryan Morrow
- Leibniz Institute for Solid State and Materials Research Dresden IFW Helmholtzstr. 20 D‐01069 Dresden Germany
| | - Mihai I. Sturza
- Leibniz Institute for Solid State and Materials Research Dresden IFW Helmholtzstr. 20 D‐01069 Dresden Germany
| | - Rajyavardhan Ray
- Leibniz Institute for Solid State and Materials Research Dresden IFW Helmholtzstr. 20 D‐01069 Dresden Germany
- Dresden Center for Computational Materials Science (DCMS) Technische Universität Dresden D‐01062 Dresden Germany
| | - Cameliu Himcinschi
- Institute of Theoretical Physics TU Bergakademie Freiberg D‐09599 Freiberg Germany
| | - Jonas Kern
- Institute of Theoretical Physics TU Bergakademie Freiberg D‐09599 Freiberg Germany
| | - Philipp Schlender
- Faculty of Chemistry and Food Chemistry Technische Universität Dresden D‐01062 Dresden Germany
| | - Manuel Richter
- Leibniz Institute for Solid State and Materials Research Dresden IFW Helmholtzstr. 20 D‐01069 Dresden Germany
- Dresden Center for Computational Materials Science (DCMS) Technische Universität Dresden D‐01062 Dresden Germany
| | - Sabine Wurmehl
- Leibniz Institute for Solid State and Materials Research Dresden IFW Helmholtzstr. 20 D‐01069 Dresden Germany
| | - Bernd Büchner
- Leibniz Institute for Solid State and Materials Research Dresden IFW Helmholtzstr. 20 D‐01069 Dresden Germany
- Institut für Festkörperphysik Technische Universität Dresden D‐01069 Dresden Germany
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Tesar K, Gregora I, Beresova P, Vanek P, Ondrejkovic P, Hlinka J. Raman scattering yields cubic crystal grain orientation. Sci Rep 2019; 9:9385. [PMID: 31253866 PMCID: PMC6599203 DOI: 10.1038/s41598-019-45782-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 06/14/2019] [Indexed: 12/04/2022] Open
Abstract
The paper proposes a fully optical method for determination of a cubic crystal grain orientation in a sample inspected by a Raman microscope. The method is based on a universal and strong polarisation anisotropy of the Raman scattering by doubly degenerate optic phonon modes and it only requires a standard Raman microscope equipped with a polarisation analysis. Explicit formulas for the orientation of the crystal grain are derived. The feasibility of the approach is demonstrated by comparing grain orientations in a polycrystalline cubic lacunar spinel GaV4S8 determined independently using electron backscatter diffraction and Raman scattering methods.
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Affiliation(s)
- K Tesar
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, Prague 8, 182 21, Czech Republic.,Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Department of Materials, Trojanova 13, Praha 2, 120 00, Czech Republic
| | - I Gregora
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, Prague 8, 182 21, Czech Republic
| | - P Beresova
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, Prague 8, 182 21, Czech Republic
| | - P Vanek
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, Prague 8, 182 21, Czech Republic
| | - P Ondrejkovic
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, Prague 8, 182 21, Czech Republic
| | - J Hlinka
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, Prague 8, 182 21, Czech Republic.
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Jena AK, Satapathy S, Mohanty J. Magnetic properties and oxygen migration induced resistive switching effect in Y substituted multiferroic bismuth ferrite. Phys Chem Chem Phys 2019; 21:15854-15860. [DOI: 10.1039/c9cp02528f] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Low field magnetic saturation and forming-free resistive switching behavior in non-magnetic modified room temperature multiferroic BiFeO3 thin film.
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Affiliation(s)
- A. K. Jena
- Nanomagnetism and Microscopy Laboratory
- Department of Physics
- Indian Institute of Technology Hyderabad
- Sangareddy
- India
| | - S. Satapathy
- Laser Material Section
- Raja Ramanna Center for Advanced Technology
- Indore 452013
- India
- Homi Bhaba National Institute
| | - J. Mohanty
- Nanomagnetism and Microscopy Laboratory
- Department of Physics
- Indian Institute of Technology Hyderabad
- Sangareddy
- India
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