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Bertolini G, Gürlü O, Pröbsting R, Westholm D, Wei J, Ramsperger U, Zanin DA, Cabrera H, Pescia D, Xanthakis JP, Schnedler M, Dunin-Borkowski RE. Non-topographic current contrast in scanning field emission microscopy. R Soc Open Sci 2021; 8:210511. [PMID: 34295530 PMCID: PMC8278050 DOI: 10.1098/rsos.210511] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 06/21/2021] [Indexed: 06/13/2023]
Abstract
In scanning field emission microscopy (SFEM), a tip (the source) is approached to few (or a few tens of) nanometres distance from a surface (the collector) and biased to field-emit electrons. In a previous study (Zanin et al. 2016 Proc. R. Soc. A 472, 20160475. (doi:10.1098/rspa.2016.0475)), the field-emitted current was found to change by approximately 1% at a monatomic surface step (approx. 200 pm thick). Here we prepare surface domains of adjacent different materials that, in some instances, have a topographic contrast smaller than 15 pm. Nevertheless, we observe a contrast in the field-emitted current as high as 10%. This non-topographic collector material dependence is a yet unexplored degree of freedom calling for a new understanding of the quantum mechanical tunnelling barrier at the source site that takes into account the properties of the material at the collector site.
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Affiliation(s)
- G. Bertolini
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
| | - O. Gürlü
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
| | - R. Pröbsting
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
| | - D. Westholm
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
| | - J. Wei
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
| | - U. Ramsperger
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
| | - D. A. Zanin
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
| | - H. Cabrera
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
| | - D. Pescia
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
| | - J. P. Xanthakis
- Electrical and Computer Engineering Department, National Technical University of Athens, Athens 15700, Greece
| | - M. Schnedler
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - R. E. Dunin-Borkowski
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich, 52425 Jülich, Germany
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2
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De Pietro L, Bertolini G, Peter Q, Cabrera H, Vindigni A, Gürlü O, Pescia D, Ramsperger U. Spin-polarised electrons in a one-magnet-only Mott spin junction. Sci Rep 2017; 7:13237. [PMID: 29038570 PMCID: PMC5643535 DOI: 10.1038/s41598-017-13453-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 09/22/2017] [Indexed: 11/08/2022] Open
Abstract
The current flowing through a Mott spin junction depends on the relative spin orientation of the two ferromagnetic layers comprising the "source" and "drain" sides of the junction. The resulting current asymmetry is detected as giant or tunnelling magnetoresistance depending on whether the two ferromagnets are separated by a metal or an insulator. Based on the fundamental principles of reciprocity for spin-dependent electron scattering, one can envisage a one-magnet-only spin junction in which the source is non-magnetic, and the spin information is encoded by the spin polarisation of the electrons that have crossed or are backscattered from the drain magnetic layer. The practical significance of using an unpolarised source is that the state of the magnetic layer can be modified without affecting the process of probing it. Whether this reciprocity is realised in the actual junctions is not yet known. Here, we demonstrate a nano-sized, one-magnet-only Mott spin junction by measuring the finite spin polarisation of the backscattered electrons. Based on this finding, we conclude that since the junction acts as a spin filter, the magnetic layer must experience a spin transfer that could become detectable in view of the high current densities achievable in this technology.
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Affiliation(s)
- L De Pietro
- Laboratorium fur Festkörperphysik, ETH Zürich, Zürich, 8093, Switzerland
| | - G Bertolini
- Laboratorium fur Festkörperphysik, ETH Zürich, Zürich, 8093, Switzerland
| | - Q Peter
- Laboratorium fur Festkörperphysik, ETH Zürich, Zürich, 8093, Switzerland
| | - H Cabrera
- Laboratorium fur Festkörperphysik, ETH Zürich, Zürich, 8093, Switzerland
| | - A Vindigni
- Laboratorium fur Festkörperphysik, ETH Zürich, Zürich, 8093, Switzerland
| | - O Gürlü
- Laboratorium fur Festkörperphysik, ETH Zürich, Zürich, 8093, Switzerland
- Department of Physics, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey
| | - D Pescia
- Laboratorium fur Festkörperphysik, ETH Zürich, Zürich, 8093, Switzerland
| | - U Ramsperger
- Laboratorium fur Festkörperphysik, ETH Zürich, Zürich, 8093, Switzerland.
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Zanin DA, De Pietro LG, Peter Q, Kostanyan A, Cabrera H, Vindigni A, Bähler T, Pescia D, Ramsperger U. Thirty per cent contrast in secondary-electron imaging by scanning field-emission microscopy. Proc Math Phys Eng Sci 2016; 472:20160475. [PMID: 27956876 PMCID: PMC5134307 DOI: 10.1098/rspa.2016.0475] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We perform scanning tunnelling microscopy (STM) in a regime where primary electrons are field-emitted from the tip and excite secondary electrons out of the target—the scanning field-emission microscopy regime (SFM). In the SFM mode, a secondary-electron contrast as high as 30% is observed when imaging a monoatomic step between a clean W(110)- and an Fe-covered W(110)-terrace. This is a figure of contrast comparable to STM. The apparent width of the monoatomic step attains the 1 nm mark, i.e. it is only marginally worse than the corresponding width observed in STM. The origin of the unexpected strong contrast in SFM is the material dependence of the secondary-electron yield and not the dependence of the transported current on the tip–target distance, typical of STM: accordingly, we expect that a technology combining STM and SFM will highlight complementary aspects of a surface while simultaneously making electrons, selected with nanometre spatial precision, available to a macroscopic environment for further processing.
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Affiliation(s)
- D A Zanin
- Laboratory for Solid State Physics , ETH Zurich , 8093 Zurich, Switzerland
| | - L G De Pietro
- Laboratory for Solid State Physics , ETH Zurich , 8093 Zurich, Switzerland
| | - Q Peter
- Laboratory for Solid State Physics , ETH Zurich , 8093 Zurich, Switzerland
| | - A Kostanyan
- Laboratory for Solid State Physics , ETH Zurich , 8093 Zurich, Switzerland
| | - H Cabrera
- Laboratory for Solid State Physics , ETH Zurich , 8093 Zurich, Switzerland
| | - A Vindigni
- Laboratory for Solid State Physics , ETH Zurich , 8093 Zurich, Switzerland
| | - Th Bähler
- Laboratory for Solid State Physics , ETH Zurich , 8093 Zurich, Switzerland
| | - D Pescia
- Laboratory for Solid State Physics , ETH Zurich , 8093 Zurich, Switzerland
| | - U Ramsperger
- Laboratory for Solid State Physics , ETH Zurich , 8093 Zurich, Switzerland
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Michaels TCT, Cabrera H, Zanin DA, De Pietro L, Ramsperger U, Vindigni A, Pescia D. Scaling theory of electric-field-assisted tunnelling. Proc Math Phys Eng Sci 2014; 470:20140014. [PMID: 25002824 PMCID: PMC4032555 DOI: 10.1098/rspa.2014.0014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Accepted: 04/02/2014] [Indexed: 11/17/2022] Open
Abstract
Recent experiments report the current (I) versus voltage (V) characteristics of a tunnel junction consisting of a metallic tip placed at a distance d from a planar electrode, d varying over six orders of magnitude, from few nanometres to few millimetres. In the ‘electric-field-assisted’ (or ‘field emission’) regime, as opposed to the direct tunnelling regime used in conventional scanning tunnelling microscopy, all I–V curves are found to collapse onto one single graph when d is suitably rescaled, suggesting that the current I=I(V,d) is in reality a generalized homogeneous function of one single variable, i.e. I=I(V⋅d−λ), where λ being some characteristic exponent and I(x) being a scaling function. In this paper, we provide a comprehensive explanation—based on analytical arguments, numerical simulations and further experimental results—for the scaling behaviour that we show to emerge for a variety of tip–plane geometries and thus seems to be a general feature of electric-field-assisted tunnelling.
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Affiliation(s)
- Thomas C T Michaels
- Department of Chemistry , University of Cambridge , Lensfield Road, Cambridge CB2 1EW, UK
| | - H Cabrera
- Laboratory for Solid State Physics , ETH Zurich , Zurich 8093, Switzerland
| | - D A Zanin
- Laboratory for Solid State Physics , ETH Zurich , Zurich 8093, Switzerland
| | - L De Pietro
- Laboratory for Solid State Physics , ETH Zurich , Zurich 8093, Switzerland
| | - U Ramsperger
- Laboratory for Solid State Physics , ETH Zurich , Zurich 8093, Switzerland
| | - A Vindigni
- Laboratory for Solid State Physics , ETH Zurich , Zurich 8093, Switzerland
| | - D Pescia
- Laboratory for Solid State Physics , ETH Zurich , Zurich 8093, Switzerland
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Abstract
We have theoretically explained the experimentally observed scaling properties of the current–voltage (I–V) characteristics of a field-emission tunnelling diode with respect to the tip–anode distance
d
. All the I–V curves for different
d
-values collapse onto a single curve by a scaling transformation that keeps the electrical field at a given direction constant for different
d
. Our proof is applicable to more than just the obvious case where the electrostatic potential varies linearly with the distance from the cathode
x
(and the Fowler–Nordheim plot is also linear). It applies to any general nonlinear potential encountered in emitting tips of small radii of curvature
R
. Furthermore, we explain why the scaling property is excellent at
d
≫
R
, but deteriorates when
d
∼
R
. The scaling property is shown to derive from the simultaneous action of two factors: (i) in a Taylor expansion of the potential in the tunnelling region, the second-order coefficient is found to be proportional to the first-order coefficient and their ratio independent of
d
. (ii) The angular variation of the electric field is independent of
d
for
d
≫
R
. Deviations from scaling at
d
∼
R
are attributed to both the dependence on
d
of the angular variation of the electrical field and/or the presence of a third-order term.
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Affiliation(s)
- A. Kyritsakis
- Department of Electrical and Computer Engineering, National Technical University of Athens, Zografou Campus, Athens 15700, Greece
| | - J. P. Xanthakis
- Department of Electrical and Computer Engineering, National Technical University of Athens, Zografou Campus, Athens 15700, Greece
| | - D. Pescia
- Laboratory for Solid State Physics, ETH Zurich, Zürich 8093, Switzerland
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Saratz N, Lichtenberger A, Portmann O, Ramsperger U, Vindigni A, Pescia D. Experimental phase diagram of perpendicularly magnetized ultrathin ferromagnetic films. Phys Rev Lett 2010; 104:077203. [PMID: 20366912 DOI: 10.1103/physrevlett.104.077203] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Indexed: 05/29/2023]
Abstract
We image the domain patterns in perpendicularly magnetized ultrathin Fe films on Cu(100) as a function of the temperature T and the applied magnetic field H. Between the low-field stripe phase and the high-field uniform phase we find a bubble phase, consisting of reversed circular domains in a homogeneous background. The curvature of the transition lines in the H-T parameter space is in contrast to the general expectations. The pattern transformations show yet undetected scaling properties.
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Affiliation(s)
- N Saratz
- Laboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland
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Kirk T, De Pietro L, Pescia D, Ramsperger U. Electron beam confinement and image contrast enhancement in near field emission scanning electron microscopy. Ultramicroscopy 2009; 109:463-6. [DOI: 10.1016/j.ultramic.2008.11.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2008] [Revised: 10/31/2008] [Accepted: 11/04/2008] [Indexed: 11/15/2022]
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Panaccione G, Vobornik I, Fujii J, Krizmancic D, Annese E, Giovanelli L, Maccherozzi F, Salvador F, De Luisa A, Benedetti D, Gruden A, Bertoch P, Polack F, Cocco D, Sostero G, Diviacco B, Hochstrasser M, Maier U, Pescia D, Back CH, Greber T, Osterwalder J, Galaktionov M, Sancrotti M, Rossi G. Advanced photoelectric effect experiment beamline at Elettra: A surface science laboratory coupled with Synchrotron Radiation. Rev Sci Instrum 2009; 80:043105. [PMID: 19405649 DOI: 10.1063/1.3119364] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We report the main characteristics of the advanced photoelectric effect experiments beamline, operational at Elettra storage ring, featuring a fully independent double branch scheme obtained by the use of chicane undulators and able to keep polarization control in both linear and circular mode. The paper describes the novel technical solutions adopted, namely, (a) the design of a quasiperiodic undulator resulting in optimized suppression of higher harmonics over a large photon energy range (10-100 eV), (b) the thermal stability of optics under high heat load via cryocoolers, and (c) the end station interconnected setup allowing full access to off-beam and on-beam facilities and, at the same time, the integration of users' specialized sample growth chambers or modules.
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Affiliation(s)
- G Panaccione
- TASC Laboratory, INFM-CNR, S.S. 14-Km 163.5 in AREA Science Park, I-34012 Basovizza, Trieste, Italy.
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Portmann O, Vaterlaus A, Pescia D. Observation of stripe mobility in a dipolar frustrated ferromagnet. Phys Rev Lett 2006; 96:047212. [PMID: 16486892 DOI: 10.1103/physrevlett.96.047212] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2005] [Indexed: 05/06/2023]
Abstract
We have discovered two novel aspects of the stripe-domain to paramagnetic transition in perpendicularly magnetized Fe films on Cu(100). First, the width of the stripes carrying oppositely oriented spins decreases, close to the transition temperature, with a power law. Second, in a small temperature interval close to the transition temperature, the stripes--which form stationary patterns at low temperatures--become mobile. Various theoretical works have predicted stripe mobility in similar frustrated systems but no direct proof of this phenomenon has been reported so far.
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Affiliation(s)
- O Portmann
- Laboratorium für Festkörperphysik, ETH Zürich, 8093 Zürich, Switzerland
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Buess M, Höllinger R, Haug T, Perzlmaier K, Krey U, Pescia D, Scheinfein MR, Weiss D, Back CH. Fourier transform imaging of spin vortex eigenmodes. Phys Rev Lett 2004; 93:077207. [PMID: 15324274 DOI: 10.1103/physrevlett.93.077207] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2004] [Indexed: 05/24/2023]
Abstract
Thin-circular lithographically defined magnetic elements with a spin vortex configuration are excited with a short perpendicular magnetic field pulse. We report the first images of excited magnetic eigenmodes up to third order, obtained by means of a phase sensitive Fourier transform imaging technique. Both axially symmetric and symmetry breaking azimuthal eigenmodes are observed. We observe strong oscillations of the magnetization in the central part of the magnetic elements. The experimental data are in good agreement with micromagnetic simulations.
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Affiliation(s)
- M Buess
- Institut für Experimentelle und Angewandte Physik, Universität Regensburg, Universitätsstrasse 31, 93040 Regensburg, Germany
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Portmann O, Vaterlaus A, Pescia D. An inverse transition of magnetic domain patterns in ultrathin films. Nature 2003; 422:701-4. [PMID: 12700756 DOI: 10.1038/nature01538] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2002] [Accepted: 02/21/2003] [Indexed: 11/08/2022]
Abstract
Inverse freezing and inverse melting are processes where a more symmetric phase is found at lower temperatures than at higher temperatures. Such inverse transitions are very rare. Here we report the existence of an inverse transition effect in ultrathin Fe films that are magnetized perpendicular to the film plane. The magnetization of these films is not uniform, but instead manifests itself as stripe domains with opposite perpendicular magnetization. Predictions relating to the disordering of this striped ground state in the limit of monolayer film thicknesses are controversial. Mean-field arguments predict a continuous reduction of the stripe width when the temperature is increased; other studies suggest that topological defects, such as dislocations and disclinations, might penetrate the system and induce geometrical phase transitions. We find, from scanning electron microscopy imaging, that when the temperature is increased, the low-temperature stripe domain structure transforms into a more symmetric, labyrinthine structure. However, at even higher temperatures and before the loss of magnetic order, a re-occurrence of the less symmetric stripe phase is found. Despite the widespread theoretical and experimental work on striped systems, this phase sequence and the microscopic instabilities driving it have not been observed before.
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Affiliation(s)
- O Portmann
- Laboratorium für Festkörperphysik, Eidgenössische Technische Hochschule Zürich, CH-8093 Zürich, Switzerland.
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Abstract
For the development of future magnetic data storage technologies, the ultrafast generation of local magnetic fields is essential. Subnanosecond excitation of the magnetic state has so far been achieved by launching current pulses into micro-coils and micro-striplines and by using high-energy electron beams. Local injection of a spin-polarized current through an all-metal junction has been proposed as an efficient method of switching magnetic elements, and experiments seem to confirm this. Spin injection has also been observed in hybrid ferromagnetic-semiconductor structures. Here we introduce a different scheme for the ultrafast generation of local magnetic fields in such a hybrid structure. The basis of our approach is to optically pump a Schottky diode with a focused, approximately 150-fs laser pulse. The laser pulse generates a current across the semiconductor-metal junction, which in turn gives rise to an in-plane magnetic field. This scheme combines the localization of current injection techniques with the speed of current generation at a Schottky barrier. Specific advantages include the ability to rapidly create local fields along any in-plane direction anywhere on the sample, the ability to scan the field over many magnetic elements and the ability to tune the magnitude of the field with the diode bias voltage.
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Affiliation(s)
- Y Acremann
- Laboratorium für Festkörperphysik, Eidgenössische Technische Hochschule Zürich, CH-8093 Zürich, Switzerland
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15
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Abstract
We report on imaging of three-dimensional precessional orbits of the magnetization vector in a magnetic field by means of a time-resolved vectorial Kerr experiment that measures all three components of the magnetization vector with picosecond resolution. Images of the precessional mode taken with submicrometer spatial resolution reveal that the dynamical excitation in this time regime roughly mirrors the symmetry of the underlying equilibrium spin configuration and that its propagation has a non-wavelike character. These results should form the basis for realistic models of the magnetization dynamics in a largely unexplored but technologically increasingly relevant time scale.
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Affiliation(s)
- Y Acremann
- Laboratorium für Festkörperphysik, Eidgenössische Technische Hochschule (ETH) Zürich, CH-8093 Zürich, Switzerland
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Vaterlaus A, Stamm C, Maier U, Pini MG, Politi P, Pescia D. Two-step disordering of perpendicularly magnetized ultrathin films. Phys Rev Lett 2000; 84:2247-2250. [PMID: 11017255 DOI: 10.1103/physrevlett.84.2247] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/1999] [Indexed: 05/23/2023]
Abstract
We have imaged the stripe domain structure of perpendicularly magnetized fcc ultrathin Fe films grown on Cu(100). The stripe phase has a strong local orientational order and sustains the two kinds of fluctuations predicted by Abanov et al. [Phys. Rev. B 51, 1023 (1995)]: meandering and dislocations. Before reaching the Curie temperature, the stripes transform into a new and so far unobserved domain structure, characterized by domains with predominantly square corners. We argue that this phase is the tetragonal liquid phase proposed by Abanov et al. to separate the stripe phase from the paramagnetic phase. This two-step disordering is reminiscent of a two-dimensional melting process.
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Affiliation(s)
- A Vaterlaus
- Laboratorium für Festkörperphysik, Eidgenössische Technische Hochschule Zürich, CH-8093 Zürich, Switzerland
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17
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Abstract
Single two-dimensional (2D) atomically thick magnetic particles of cobalt and iron with variable size and shape were fabricated by combining a mask technique with standard molecular beam epitaxy. Reduction of the lateral size of in-plane magnetized 2D cobalt films down to about 100 nanometers did not essentially modify their magnetic properties; although the separation of boundaries decreased greatly, neither domain penetrated the particle, nor was any sizable shape anisotropy observed. The mutual interaction of 2D cobalt particles was negligible, and the magnetic state of a single particle could be switched without modifying the state of the neighbors. Perpendicularly magnetized iron particles did not exhibit such responses. These results suggest that only a few atoms forming a 2D in-plane magnetized dot may provide a stable elementary bit for nanorecording.
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Affiliation(s)
- C Stamm
- C. Stamm, F. Marty, A. Vaterlaus, V. Weich, S. Egger, U. Maier, D. Pescia, Laboratorium fur Festkorperphysik, Eidgenossische Technische Hochschule (ETH) Zurich, CH-8093 Zurich, Switzerland. U. Ramsperger, National Research Institute for M
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19
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Back CH, Weber W, Bischof A, Pescia D, Allenspach R. Erratum: Probing oscillatory exchange coupling with a paramagnet. Phys Rev B Condens Matter 1996; 54:12595. [PMID: 9986982 DOI: 10.1103/physrevb.54.12595.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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20
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Weber W, Bischof A, Allenspach R, Würsch C, Back CH, Pescia D. Oscillatory magnetic anisotropy and quantum well states in Cu/Co/Cu(100) films. Phys Rev Lett 1996; 76:3424-3427. [PMID: 10060963 DOI: 10.1103/physrevlett.76.3424] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Ramsperger U, Vaterlaus A, Pfäffli P, Maier U, Pescia D. Growth of Co on a stepped and on a flat Cu(001) surface. Phys Rev B Condens Matter 1996; 53:8001-8006. [PMID: 9982256 DOI: 10.1103/physrevb.53.8001] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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22
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Back CH, Würsch C, Vaterlaus A, Ramsperger U, Maier U, Pescia D. Experimental confirmation of universality for a phase transition in two dimensions. Nature 1995. [DOI: 10.1038/378597a0] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Back CH, Weber W, Bischof A, Pescia D, Allenspach R. Probing oscillatory exchange coupling with a paramagnet. Phys Rev B Condens Matter 1995; 52:13114-13117. [PMID: 9980492 DOI: 10.1103/physrevb.52.r13114] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Hochstrasser M, Zurkirch M, Wetli E, Pescia D, Erbudak M. Growth of Co films on Cu(111) studied in real space. Phys Rev B Condens Matter 1994; 50:17705-17708. [PMID: 9976196 DOI: 10.1103/physrevb.50.17705] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kerkmann D, Pescia D, Allenspach R. Kerkmann, Pescia, and Allenspach reply. Phys Rev Lett 1992; 69:1289. [PMID: 10047177 DOI: 10.1103/physrevlett.69.1289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Pini MG, Rettori A, Pescia D, Majlis N, Selzer S. Erratum: Breakdown of free-spin-wave theory in two-dimensional films of Co on Cu/(100). Phys Rev B Condens Matter 1992; 46:3207. [PMID: 10004035 DOI: 10.1103/physrevb.46.3207.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Pini MG, Rettori A, Pescia D, Majlis N, Selzer S. Breakdown of free-spin-wave theory in two-dimensional films of Co on Cu/(100). Phys Rev B Condens Matter 1992; 45:5037-5040. [PMID: 10002152 DOI: 10.1103/physrevb.45.5037] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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31
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Kerkmann D, Pescia D, Allenspach R. Two-dimensional magnet at Curie temperature: Epitaxial layers of Co on Cu(100). Phys Rev Lett 1992; 68:686-689. [PMID: 10045964 DOI: 10.1103/physrevlett.68.686] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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32
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Pescia D, Pokrovsky VL. Perpendicular versus in-plane magnetization in a 2D Heisenberg monolayer at finite temperatures. Phys Rev Lett 1990; 65:2599-2601. [PMID: 10042638 DOI: 10.1103/physrevlett.65.2599] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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34
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Weber W, Kerkmann D, Pescia D, Wesner DA, Güntherodt G. Enhancement of the Curie temperature of epitaxial Fe films on W(110) caused by adsorption of submonolayers of Fe, Pd, Ag, and O. Phys Rev Lett 1990; 65:2058-2061. [PMID: 10042436 DOI: 10.1103/physrevlett.65.2058] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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35
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36
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Dürr W, Taborelli M, Paul O, Germar R, Gudat W, Pescia D, Landolt M. Magnetic phase transition in two-dimensional ultrathin Fe films on Au(100). Phys Rev Lett 1989; 62:206-209. [PMID: 10039950 DOI: 10.1103/physrevlett.62.206] [Citation(s) in RCA: 74] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Pescia D. Magnetische Eigenschaften zweidimensionaler Systeme. Naturwissenschaften 1989. [DOI: 10.1007/bf00368304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Beier T, Jahrreiss H, Pescia D, Woike T, Gudat W. Magnetic hysteresis loop of one monolayer of Co on Cu(100). Phys Rev Lett 1988; 61:1875-1877. [PMID: 10038920 DOI: 10.1103/physrevlett.61.1875] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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40
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Stampanoni M, Vaterlaus A, Pescia D, Aeschlimann M, Meier F, Dürr W, Blügel S. Lack of evidence for ferromagnetism in the vanadium monolayer on Ag(001). Phys Rev B Condens Matter 1988; 37:10380-10382. [PMID: 9944481 DOI: 10.1103/physrevb.37.10380] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Pescia D, Stampanoni M, Bona GL, Vaterlaus A, Willis RF, Meier F. Magnetism of epitaxial fcc: Iron films on Cu(001) investigated by spin-polarized photoelectron emission. Phys Rev Lett 1987; 58:2126-2129. [PMID: 10034655 DOI: 10.1103/physrevlett.58.2126] [Citation(s) in RCA: 59] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Bland JA, Pescia D, Willis RF. Ferromagnetic moments in metastable magnetic films by spin-polarized-neutron reflection. Phys Rev Lett 1987; 58:1244-1247. [PMID: 10034379 DOI: 10.1103/physrevlett.58.1244] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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44
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Pescia D, Zampieri G, Stampanoni M, Bona GL, Willis RF, Meier F. Ferromagnetism of thin epitaxial fcc cobalt films on Cu(001) obesrved by spin-polarized photoemission. Phys Rev Lett 1987; 58:933-936. [PMID: 10035076 DOI: 10.1103/physrevlett.58.933] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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