Open Access

Nanomaterials

, volume 10 , issue 10 , pages 1990

Surface Modification and Enhancement of Ferromagnetism in BiFeO3 Nanofilms Deposited on HOPG

Shikhgasan Ramazanov ¹

Dinara Sobola ^{2, 3, 4}

Farid Orudzhev ⁴

Alexandr Knápek ⁵

Josef Polčak ^{3, 6}

Michal Potoček ^{3, 6}

Pavel Kaspar ²

Rashid Dallaev ²

Hide authors affiliations Show authors affiliations: 6 affiliations

Faculty of Physics, Dagestan State University, Makhachkala, St. M. Gadjieva 43-a, 367015 Makhachkala, Russia |

Department of Physics, Faculty of Electrical Engineering and Communication, Brno University of Technology, Technicka 2848/8, 61600 Brno, Czech Republic |

Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czech Republic

Brno University of Technology

Central European Institute of Technology

⁴

Department of Inorganic Chemistry and Chemical Ecology, Dagestan State University, Makhachkala, St. M. Gadjieva 43-a, 367015 Makhachkala, Russia |

⁵

Institute of the Scientific Instruments of the Czech Academy of Sciences v.v.i., Královopolská 147, 61264 Brno, Czech Republic |

⁶

Institute of Physical Engineering, Faculty of Mechanical Engineering, Brno University of Technology, Technicka 2896/2, 61669 Brno, Czech Republic |

Publication type: Journal Article

Publication date: 2020-10-09

MDPI

Nanomaterials

scimago Q1

wos Q2

SJR: 0.811

CiteScore: 9.2

Impact factor: 4.3

ISSN: 20794991

DOI: 10.3390/nano10101990

Copy DOI

PubMed ID: 33050330

General Chemical Engineering

General Materials Science

Abstract

BiFeO3 (BFO) films on highly oriented pyrolytic graphite (HOPG) substrate were obtained by the atomic layer deposition (ALD) method. The oxidation of HOPG leads to the formation of bubble regions creating defective regions with active centers. Chemisorption occurs at these active sites in ALD. Additionally, carbon interacts with ozone and releases carbon oxides (CO, CO2). Further annealing during the in situ XPS process up to a temperature of 923 K showed a redox reaction and the formation of oxygen vacancies (Vo) in the BFO crystal lattice. Bubble delamination creates flakes of BiFeO3-x/rGO heterostructures. Magnetic measurements (M–H) showed ferromagnetism (FM) at room temperature Ms ~ 120 emu/cm3. The contribution to magnetization is influenced by the factor of charge redistribution on Vo causing the distortion of the lattice as well as by the superstructure formed at the boundary of two phases, which causes strong hybridization due to the superexchange interaction of the BFO film with the FM sublattice of the interface region. The development of a method for obtaining multiferroic structures with high FM values (at room temperature) is promising for magnetically controlled applications.

Found

6 citations

Orudzhev Farid

PhD in Chemistry, associate professor

71 publications, 1 066 citations, 152 reviews

h-index: 16

Dagestan State University

Saint Petersburg State University

Amirkhanov Institute of Physics DSC RAS

Research interests

Photocatalysis

1 citation

Emelianov Nikita

PhD in Physics and Mathematics

74 publications, 432 citations, 1 review

h-index: 11

Federal Research Center of Problem of Chemical Physics and Medicinal Chemistry RAS

Research interests

Perovskite solar cells

Scanning probe microscopy

Solar energy materials

1 citation

Selimov Daud

22 publications, 241 citations

h-index: 9

Dagestan State University

1 citation

Magomedova Asiyat

15 publications, 217 citations, 1 review

h-index: 8

Dagestan State University

1 citation

Kadiev Mahmud

5 publications, 138 citations

h-index: 4

Dagestan State University

Dagestan Scientific Center of the Russian Academy of Sciences

Amirkhanov Institute of Physics DSC RAS

Research interests

Photocatalysis

1 citation

Isaev Abdulgalim

🥼 🤝

PhD in Chemistry, associate professor

49 publications, 867 citations, 87 reviews

h-index: 14

Dagestan State University

Research interests

Advanced oxidation processes

Recycling of waste

Wastewater treatment

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Ramazanov S. et al. Surface Modification and Enhancement of Ferromagnetism in BiFeO3 Nanofilms Deposited on HOPG // Nanomaterials. 2020. Vol. 10. No. 10. p. 1990.

GOST all authors (up to 50) Copy

Ramazanov S., Sobola D., Orudzhev F., Knápek A., Polčak J., Potoček M., Kaspar P., Dallaev R. Surface Modification and Enhancement of Ferromagnetism in BiFeO3 Nanofilms Deposited on HOPG // Nanomaterials. 2020. Vol. 10. No. 10. p. 1990.

RIS |

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RIS Copy

TY - JOUR

DO - 10.3390/nano10101990

UR - https://doi.org/10.3390/nano10101990

TI - Surface Modification and Enhancement of Ferromagnetism in BiFeO3 Nanofilms Deposited on HOPG

T2 - Nanomaterials

AU - Ramazanov, Shikhgasan

AU - Sobola, Dinara

AU - Orudzhev, Farid

AU - Knápek, Alexandr

AU - Polčak, Josef

AU - Potoček, Michal

AU - Kaspar, Pavel

AU - Dallaev, Rashid

PY - 2020

DA - 2020/10/09

PB - MDPI

SP - 1990

IS - 10

VL - 10

PMID - 33050330

SN - 2079-4991

ER -

BibTex |

Cite this

BibTex (up to 50 authors) Copy

@article{2020_Ramazanov,

author = {Shikhgasan Ramazanov and Dinara Sobola and Farid Orudzhev and Alexandr Knápek and Josef Polčak and Michal Potoček and Pavel Kaspar and Rashid Dallaev},

title = {Surface Modification and Enhancement of Ferromagnetism in BiFeO3 Nanofilms Deposited on HOPG},

journal = {Nanomaterials},

year = {2020},

volume = {10},

publisher = {MDPI},

month = {oct},

url = {https://doi.org/10.3390/nano10101990},

number = {10},

pages = {1990},

doi = {10.3390/nano10101990}

}

MLA

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MLA Copy

Ramazanov, Shikhgasan, et al. “Surface Modification and Enhancement of Ferromagnetism in BiFeO3 Nanofilms Deposited on HOPG.” Nanomaterials, vol. 10, no. 10, Oct. 2020, p. 1990. https://doi.org/10.3390/nano10101990.

Publisher

MDPI

Journal

Nanomaterials

scimago Q1

wos Q2

SJR

0.811

CiteScore

9.2

Impact factor

4.3

ISSN

20794991 (Electronic)

Labs

Smart Materials Laboratory

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