Strong magnetoelectric coupling at an atomic nonmagnetic electromagnetic probe in bismuth ferrite

Schell, Juliana; Schmuck, Merlin; Efe, İpek; Dang, Thien Thanh; Gonçalves, J. N.; Lewin, D.; Castillo, Marianela Escobar; Shvartsman, Vladimir V.; Costa, A. R. G.; Köster, U.; Vianden, R.; Noll, Cornelia

doi:10.1103/physrevb.105.094102

Cited by 5 publications

(3 citation statements)

References 75 publications

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“…Moreover, the existence of a singleatomic-layer multiferroic has recently been reported [11]. Similar to 2D materials, the use of radioactive probes in multiferroics research opens many new experimental possibilities [12].…”

Section: Multiferroicsmentioning

confidence: 99%

Introducing Ultra-Low Energy Ion Implantation of Radioactive Isotopes at ISOLDE, CERN for (Near-)Surface Characterization: The ASPIC and ASCII Vacuum Chambers

et al. 2022

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Solid-state physics research has long employed radioactive isotopes to investigate the crystallographic, electric and magnetic properties of nanostructures. Ion implantation (1–100 keV) is the method of choice for incorporating radioactive nuclei into the crystal structure. However, the enormous scientific interest in 2D materials, multiferroics and their interfaces of the last decades has lead to more stringent demands for isotope incorporation. Ultra-low energy (ULE) ion implantation (10–100 eV) provides the ability to precisely tune the depth of the implanted radioactive probes, even in the case of atomically thin 2D materials. To unlock this potential and expand the experimental capabilities of the ISOLDE collaboration in CERN, the apparatus for surface physics and interfaces at CERN (ASPIC), an experienced ultra-high vacuum chamber dedicated to surface characterization and modification, is refurbished and upgraded with a new component: the ASPIC’s ion implantation (ASCII) chamber, designed for ULE ion implantation of radioactive probes. This paper describes the scientific context, design and application of these vacuum chambers.

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Section: Multiferroicsmentioning

confidence: 99%

Introducing Ultra-Low Energy Ion Implantation of Radioactive Isotopes at ISOLDE, CERN for (Near-)Surface Characterization: The ASPIC and ASCII Vacuum Chambers

et al. 2022

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“…Although BFO exhibits the magnetoelectric effect at room temperature, as confirmed in measurements with hyperfine interaction techniques [5,6], the magnetoelectric coupling in BFO is too weak for practical applications, due to a modification of the antiferromagnetic G-type spin configuration by a long-range spiral spin superstructure. This spiral spin superstructure cancels the macroscopic magnetization and, thus, prevents a linear magnetoelectric effect.…”

Section: Introductionmentioning

confidence: 96%

Temperature Dependence of the Hyperfine Magnetic Field at Fe Sites in Ba-Doped BiFeO3 Thin Films Studied by Emission Mössbauer Spectroscopy

et al. 2023

Self Cite

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Emission 57Fe Mössbauer spectroscopy (eMS), following the implantation of radioactive 57Mn+ ions, has been used to study the temperature dependence of the hyperfine magnetic field at Fe sites in Ba-doped BiFeO3 (BFO) thin films. 57Mn β decays (t1/2 = 90 s) to the 14.4 keV Mössbauer state of 57Fe, thus allowing online eMS measurements at a selection of sample temperatures during Mn implantation. The eMS measurements were performed on two thin film BFO samples, 88 nm and 300 nm thick, and doped to 15% with Ba ions. The samples were prepared by pulsed laser deposition on SrTiO3 substrates. X-ray diffraction analyses of the samples showed that the films grew in a tetragonal distorted structure. The Mössbauer spectra of the two films, measured at absorber temperatures in the range 301 K–700 K, comprised a central pair of paramagnetic doublets and a magnetic sextet feature in the wings. The magnetic component was resolved into (i) a component attributed to hyperfine interactions at Fe3+ ions located in octahedral sites (Bhf); and (ii) to Fe3+ ions in implantation induced lattice defects, which were characterized by a distribution of the magnetic field BDistr. The hyperfine magnetic field at the Fe probes in the octahedral site has a room temperature value of Bhf = 44.5(9) T. At higher sample temperatures, the Bhf becomes much weaker, with the Fe3+ hyperfine magnetic contribution disappearing above 700 K. Simultaneous analysis of the Ba–BFO eMS spectra shows that the variation of the hyperfine field with temperature follows the Brillouin curve for S = 5/2.

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“…Perturbed angular correlation (PAC) spectroscopy is an appropriate powerful hyperfine technique due to its high sensitivity to even small changes in the system, which include local properties such as the electric field gradient (EFG) tensor and magnetic hyperfine field (MHF) contributions. As a result, PAC spectroscopy can obtain data on defects (vacancies and distortions) [18], phase transitions, and diluted clusters in bulk materials [19,20], as well as thin films and nanomaterials [21][22][23]. PAC, in particular, is a nuclear technique whose signal is unaffected by high temperatures, thereby making it suitable for a variety of environments such as liquid phases, diffusion measurements, and thermodynamic properties.…”

Section: Introductionmentioning

confidence: 99%

Cobalt Doping Effects in Zinc Oxide: A Combined Experimental and Ab Initio Approach

Pereira,

Ferreira,

Correa

et al. 2023

Crystals

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In this paper, we investigate the solubility effects of Co in ZnO (Zn1−xCoxO, where x = 0, 0.03, 0.05, 0.1, 0.2, 0.25, 0.4, 0.8, and 1) by combining the results of perturbed angular correlation (PAC) spectroscopy using highly diluted 111Cd as probe nuclei and ab initio calculations based on spin-density functional theory (SDFT). This combined approach enables us to characterize the local structure around Cd ions, where, through PAC technique, it was possible to measure the EFG as a function of temperature and Co concentration and thereby monitor the changes in the structure and the Co solubility threshold in ZnO and the ZnO/CoO/Co3O4 mixed phase. The full-potential linear augmented plane wave plus local orbital (APW+lo) formalism were used here to describe the electronic structure of the supercells, including the atomic relaxations. These Ab initio calculations show an interesting behavior of the Cd and Co impurity levels in the band structure of ZnO, which explains the experimental results in terms of the origin of EFG and the evidence of ferromagnetic response.

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Strong magnetoelectric coupling at an atomic nonmagnetic electromagnetic probe in bismuth ferrite

Cited by 5 publications

References 75 publications

Introducing Ultra-Low Energy Ion Implantation of Radioactive Isotopes at ISOLDE, CERN for (Near-)Surface Characterization: The ASPIC and ASCII Vacuum Chambers

Introducing Ultra-Low Energy Ion Implantation of Radioactive Isotopes at ISOLDE, CERN for (Near-)Surface Characterization: The ASPIC and ASCII Vacuum Chambers

Temperature Dependence of the Hyperfine Magnetic Field at Fe Sites in Ba-Doped BiFeO3 Thin Films Studied by Emission Mössbauer Spectroscopy

Cobalt Doping Effects in Zinc Oxide: A Combined Experimental and Ab Initio Approach

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