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1
Content available remote Fizyka w zastosowaniach [Ze zjazdów i konferencji]
100%
Jartych E.
|
2003
|
tom T. 54, z. 5
221-221
PL
5 czerwca 2003 r. w Auli im. Stanisława Ziemeckiego Wydziału Matematyki, Fizyki i Informatyki UMCS odbyła [się kolejna, już V Sesja Naukowa "Fizyka w zastosowaniach". Sesję zorganizowała Komisja Podstaw i Zastosowań Fizyki i Chemii w Technice i Rolnictwie (KPiZ) Oddziału Lubelskiego PAN w Lublinie oraz Oddział Lubelski Polskiego Towarzystwa Fizycznego. W Sesji uczestniczyło kilkadziesiąt osób reprezentujących UMCS, Politechnikę lubelską, Akademię Rolniczą, Instytut Agrofizyki PAN i Akademię Medyczną w Lublinie. Zebranych gości przywitał prof. Ryszard Walczak, przewodniczący Komisji.
2
Content available remote Zastosowanie spektroskopii efektu mossbauera w badaniu materiałów otrzymywanych poprzez syntezę mechaniczną
100%
Jartych E.
Eksploatacja i Niezawodność
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2001
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tom nr 2-3
85-93
PL
Nowe materiały otrzymywane poprzez syntezę mechaniczną są przedmiotem intensywnych badań. Metoda syntezy mechanicznej pozwala wytwarzać różne fazy nierównowagowe, takie jak: przesycone roztwory stałe, nanostruktury, fazy metastabilne krystaliczne i quasikrystaliczne oraz materiały amorficzne. Spektroskopia efektu Mossbauera jest bardzo użytecznym narzędziem w badaniu tych materiałów. Można dzięki niej śledzić proces tworzenia się danej fazy i równocześnie określić jej uporządkowanie magnetyczne. W niniejszej pracy przedstawiono przykłady zastosowania spektroskopii efektu Mossbauera w badaniach żelaza syntetyzowanego mechanicznie z niklem i niobem oraz reakcji syntezy hematytu z aluminium.
EN
New materials prepared by mechanosynthesis are the subjects of very intensive research. Mechanosynthesis is the method allowing to obtain various non-equilibrium phases, such as supersaturated solid solutions, nanostructures, metastable crystalline and quasicrystalline phases and amorphous materials. Mossbauer spectroscopy is a very useful tool for the investigation of these materials. It is possible to monitor the phase formation process and to determine the magnetic arrangement of the phase by Mossbauer spectroscopy. In this paper are presented examples of the application of the Mossbauer spectroscopy in the investigation of the iron mechanosynthesized with nickel and niobium and of the reaction of hematite with aluminium are described.
3
Content available remote 60-lecie Oddziału Lubelskiego [PTF]
88%
Jartych E.
|
2008
|
tom T. 59, z. 3
132-133
4
Content available A comparative study of hyperfine interactions in Aurivillius compounds prepared by mechanical activation and solid-state sintering
63%
Mazurek M. , Jartych E.
Nukleonika
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2017
|
tom Vol. 62, No. 2
153--157
EN
X-ray diffraction and Mössbauer spectroscopy techniques were used to study the structure and hyperfine interactions of multiferroic Aurivillius compounds Bim+1Ti3Fem–3O3m+3. Samples were synthesized by two methods, that is, the solid-state sintering at various temperatures and mechanical activation in a high-energy ball mill. The compounds were obtained from a mixture of three polycrystalline powder oxides, that is, TiO2, Fe2O3 and Bi2O3. At room temperature, the Aurivillius compounds are paramagnetic materials with orthorhombic crystal structure. The c lattice parameter of the unit cell depends linearly on the m − number of layers with perovskite--like structure. Based on the Mössbauer studies, it is concluded that the hyperfine interactions parameters do not change with m number.
5
Content available remote Nagroda im. prof. Włodzimierza Żuka [PTF]
63%
Jartych E.
|
2004
|
tom T. 55, z. 2
66-66
6
Content available Effect of BaTiO3 concentration on structural and magnetic properties of mechanically activated BiFeO3-BaTiO3 system
51%
Malesa B. , Pikula T. , Oleszak D. , Jartych E.
Nukleonika
|
2017
|
tom Vol. 62, No. 2
149--152
EN
In this research, the mechanical activation method is proposed as an alternative process of preparation of the (BiFeO3)1–x-(BaTiO3)x solid solutions with various concentrations of barium titanate (x = 0.1÷0.9). However, mechanical milling itself does not allow obtaining the desired products and additional thermal treatment is needed to complete the solid-state reaction. In the present studies, X-ray diffraction and 57Fe Mössbauer spectroscopy were applied as complementary methods in order to study the structural and magnetic properties of materials. The investigations revealed that an increase of BaTiO3 concentration causes changes in the crystalline and hyperfine magnetic structure of the studied (BiFeO3)1–x-(BaTiO3)x system.
7
Content available Synthesis and characterization of AgFeO2 delafossite with non-stoichiometric silver concentration
51%
Siedliska K. , Pikula T. , Chocyk D. , Jartych E.
Nukleonika
|
2017
|
tom Vol. 62, No. 2
165--170
EN
The simple co-precipitation method was used to prepare AgxFeO2 delafossite with non-stoichiometric silver concentration in the range of x = 0.05–1. The obtained material was investigated using X-ray powder diffraction and 57Fe Mössbauer spectroscopy at room temperature. The structural and hyperfine interaction parameters were recognized in relation with decreasing silver concentration. The study revealed that the delafossite structure of AgxFeO2 was maintained up to x = 0.9; as the range of silver concentration was decreased to 0.05 ≤ x ≤ 0.8, a mixture of AgFeO2, Fe2O3 or/and FeOOH was formed.
8
Content available remote Mössbauer studies of Bi5Ti3FeO15 electroceramic prepared by mechanical activation
51%
Mazurek M. , Jartych E. , Oleszak D.
|
|
tom R. 88, nr 9b
256-258
EN
The present work involves the structure analysis and the determination of hyperfine interactions parameters of multiferroic Bi5Ti3FeO15 electroceramic, prepared by high-energy ball milling of polycrystalline precursors (mixture of the Bi2O3, TiO2 and Fe2O3 simple oxides). This analysis was performed by X-ray diffraction and Mössbauer spectroscopy.
PL
W pracy przedstawiono wyniki badań dla multiferroicznej elektroceramiki Bi5Ti3FeO15 otrzymanej podczas procesu aktywacji mechanicznej (mielenie wysokoenergetyczne polikrystalicznych proszków Bi2O3, TiO2 i Fe2O3). Badania struktury i oddziaływań nadsubtelnych przeprowadzono metodami dyfrakcji promieniowania X oraz spektroskopii efektu Mössbauera.
9
Content available remote Hyperfine interactions in multiferroic mechanically activated BiFeO3 compound
51%
Jartych E. , Oleszak D. , Mazurek M.
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|
tom R. 88, nr 9b
242-244
EN
In this work the results of structural and magnetic investigations for multiferroic BiFeO3 compound prepared by mechanical activation are presented. The structural analysis and hyperfine interactions investigations were performed by X-ray diffraction and Mössbauer spectroscopy, respectively.
PL
W pracy przedstawiono wyniki badań strukturalnych i magnetycznych dla multiferroicznego związku BiFeO3 otrzymanego w procesie aktywacji mechanicznej. Badania struktury i oddziaływań nadsubtelnych przeprowadzono odpowiednio metodami dyfrakcji promieniowania X oraz spektroskopii efektu Mössbauera.
10
Content available remote Kronika
51%
Nowina-Konopka M. , Jartych E. , Sadowski M. P.
|
|
tom T. 58, z. 5
236-239
PL
Kolumbowie. Maciej Wojtkowski zdobywcą EURYI. Nagroda im. Mariana Mięsowicza. Nagroda Schawlowa dla Suckewera. Binder doktorem h.c. UMCS. Medal Diraca 2007. Nowe wartości stałych fizycznych. Spotkanie Ogólnopolskiego Klubu Demonstratorów. Theodore H. Maiman (1927-2007)
11
Content available Structure and hyperfine interactions of multiferroic Bim+1Ti3Fem-3O3m+3 ceramics prepared by mechanical activation
51%
Mazurek M. , Jartych E. , Oleszak D.
|
2013
|
tom Vol. 58, No. 1
143-147
EN
The structure and hyperfine interactions in the Bi5Ti3FeO15, Bi6Ti3Fe2O18 and Bi7Ti3Fe3O21 multiferroic ceramics were studied using X-ray diffraction and Mössbauer spectroscopy. Samples were prepared by mechanical activation process in a high-energy ball mill from a mixture of TiO2, Fe2O3 and Bi2O3 oxides as polycrystalline precursor materials. The mechanical milling process was completed by thermal processing. A pure single-phased material was obtained in the case of Bi7Ti3Fe3O21 compound. The proposed mechanical activation technology allows to produce the Aurivillius compounds at lower temperature, by about 50 K, as compared to the solid-state sintering method.
12
Content available remote Comparative X-ray diffraction and Mössbauer spectroscopy studies of BiFeO3 ceramics prepared by conventional solid-state reaction and mechanical activation
51%
Jartych E. , Lisinska-Czekaj A. , Oleszak D. , Czekaj D.
Materials Science Poland
|
2013
|
tom Vol. 31, No. 2
211--220
EN
The aim of this work was to prepare BiFeO3 by modified solid-state sintering and mechanical activation processes and to investigate the structure and hyperfine interactions of the material. X-ray diffraction and Mössbauer spectroscopy were applied as complementary methods. In the case of sintering, BiFeO3 phase was obtained from the mixture of precursors with 3 and 5 % excess of Bi2O3 during heating at 1023 K. Small amounts of impurities such as Bi2Fe4O9 and sillenite were recognized. In the case of mechanical activation, the milling of stoichiometric amounts of Bi2O3 and Fe2O3 followed by isothermal annealing at 973 K resulted in formation of the mixture of BiFeO3, Bi2Fe4O9, sillenite and hematite. After separate milling of individual Bi2O3 and Fe2O3 powders, mixing, further milling and thermal processing, the amount of desired BiFeO3 pure phase was significantly increased (from 70 to 90 %, as roughly estimated). From Mössbauer spectra, the hyperfine interaction parameters of the desired BiFeO3 compound, paramagnetic impurities of Bi2Fe4O9 and sillenite were determined. The main conclusion is that the lowest amount of impurities was obtained for BiFeO3 with 3 % excess of Bi2O3, which was sintered at 1023 K. However, in the case of mechanical activation, the pure phase formed at a temperature by 50 K lower as compared to solid-state sintering temperature. X-ray diffraction and Mössbauer spectroscopy revealed that for both sintered and mechanically activated BiFeO3 compounds, thermal treatment at elevated temperature led to a partial eliminating of the paramagnetic impurities.
13
Content available Structure and some magnetic properties of (BiFeO3)x-(BaTiO3)1-x solid solutions prepared by solid-state sintering
51%
Kowal K. , Kowalczyk M. , Czekaj D. , Jartych E.
Nukleonika
|
2015
|
tom Vol. 60, No. 1
81--85
EN
This paper presents the results of the study on structure and magnetic properties of the perovskite-type (BiFeO3)x-(BaTiO3)1-x solid solutions. The samples differing in the chemical composition (x = 0.9, 0.8, and 0.7) were produced according to the conventional solid-state sintering method from the mixture of powders. Moreover, three different variants of the fabrication process differing in the temperatures and soaking time were applied. The results of X-ray diffraction (XRD), Mössbauer spectroscopy (MS), and vibrating sample magnetometry (VSM) were collected and compared for the set of the investigated materials. The structural transformation from rhombohedral to cubic symmetry was observed for the samples with x = 0.7. With increasing of BaTiO3 concentration Mössbauer spectra become broadened refl ecting various confi gurations of atoms around 57Fe probes. Moreover, gradual decreasing of the average hyperfi ne magnetic fi eld and macroscopic magnetization were observed with x decreasing.
14
Content available remote Kronika
51%
Wojtowicz B. , Nowina-Konopka M. , Jartych E.
|
2009
|
tom T. 60, z. 3
128-131
PL
Tytuły profesorskie. Nowi członkowie PAU. Nagroda Templetona dla d'Espagnata. Frank Steglich doktorem honoris causa Uniwersytetu Jagiellońskiego. Ernst Bauer doktorem honoris causa Uniwersytetu Marii Curie-Skłodowskiej; Małgorzata Nowina Konopka w Europhysics News.
15
Content available remote Kronika
45%
Spichał G. , Jartych E. , Borkowski M. , Story T. , Szcześniak E.
|
2002
|
tom T. 53, z. 1
51-55
PL
PTF: Oddział Zielonogórski - nowy Oddział PTF. Nagrody FNP 2001. Doktorat h.c. Adama Sobiczewskiego. Będzie wielka nagroda dla matematyków. Sięgnąć dalej. Program MILAB w Instytucie Fizyki PAN. Rzecznik ds. nauki w Holandii. Edward Raymond Andrew (1921 - 2001).
16
Content available remote Kronika
45%
Jancewicz B. , Jartych E. , Nowina-Konopka M. , Suffczyński M. , Mostowski J.
|
2001
|
tom T. 52, z. 5
274-279
PL
PTF: Medal Smoluchowskiego, Nagrody 2001, Komunikat Komisji Nazewnictwa PTF, Oddział Lubelski. Nowy profesor. Nowy Zarząd EPS. Nagroda im. Mariana Mięsowicza. Medale EPS za popularyzację. Niemieckie medale. Nagroda Króla Faisala. FNP. Stypendia zagraniczne FNP. Urodziny Celsjusza. 125 lat od czasu wynalezienia telefonu. Urodziny Fermata. Pent. Finał 50 Olimpiady Fizycznej. Najczęściej cytowani.
17
Content available remote Magnetoelectric effect in (BiFeO3)x–(BaTiO3)1-x solid solutions
45%
Kowal K. , Jartych E. , Guzdek P. , Lisińska-Czekaj A. , Czekaj D.
Materials Science Poland
|
2015
|
tom Vol. 33, No. 1
107--112
EN
The aim of the present work was to study magnetoelectric effect (ME) in (BiFeO3)x–(BaTiO3)1-xsolid solutions in terms of technological conditions applied in the samples fabrication process. The rapidly growing interest in these materials is caused by their multiferroic behaviour, i.e. coexistence of both electric and magnetic ordering. It creates possibility for many innovative applications, e.g. in steering the magnetic memory by electric field and vice versa. The investigated samples of various chemical compositions (i.e. x = 0.7, 0.8 and 0.9) were prepared by the solid-state sintering method under three sets of technological conditions differing in the applied temperature and soaking time. Measurements of the magnetoelectric voltage coefficient αME were performed using a dynamic lock-in technique. The highest value of αME was observed for 0.7 BiFeO3–0.3 BaTiO3 solid solution sintered at the highest temperature (T = 1153 K) after initial electrical poling despite that the soaking time was reduced 10 times in this case.
18
Content available remote Kronika
38%
Geller M. , Jartych E. , Bażański S. L. , Demiański M. , Staruszkiewicz A. , Trautman A.
|
2003
|
tom T. 54, z. 1
43-47
PL
PTF. Medal Smoluchowskiego. Składki. Nagroda im. Profesora Włodzimierza Żuka. Tytuły profesorskie. Nagrody FNP. 50 lat PAN. Następny dyrektor CERN-u. Archiwa MIT w sieci. Victor F. Weisskopf (1908-2002). Peter Gabriel Bergmann (1915-2002).
19
Content available remote Kronika
38%
Wysłocki J. J. , Ajduk Z. , Łukaszewski M. , Radzewicz C. , Dohnalik T. , Jartych E. , Massalski J. M.
|
2001
|
tom T. 52, z. 6
332-336
PL
PTF: Nowy Zarząd Główny, Oddział Częstochowski. Litewskie Towarzystwo Fizyczne honoruje Ireneusza Strzałkowskiego. Nominacje profesorskie. Stefan Pokorski członkiem PAU. Fizyka i chemia na UKSW. Nagroda EPS dla Banaszka. Krajowe Laboratorium FAMO w Toruniu. Stałe fizyczne (1998). Wzorzec jednostki aktywności promieniotwórczej radionuklidów. Fizyka w zastosowaniach. Superkomputer w Berkeley. Jak fizyk "nakrył" ściągających studentów. Michalina Massalska (1915 - 2000).
20
The influence of ball milling conditions on the solid state reactions in Fe50Ge50 powder mixtures.
38%
Kubalova L. M. , Oleszak D. , Antolak A. , Jartych E. , Fadeeva V. I. , Kulik T.
Archives of Materials Science
|
2004
|
tom Vol. 25, nr 4
531-538
EN
Solid state reaction and evolution of phase composition by milling of Fe50Ge50 powder mixture using two types of mills - Fritsch P-5 and figh energy MAPF have been studied. X-ray diffraction, Moessbauer spectroscopy and differential scanning methods were used for analysis of milling products. In different mills the chemical interaction between Fe and Ge occured in different ways. Final mechanically alloyed phase was nanocrystalline FeGe (B20) however the process of FeGe formation was completed after 100 h MA in Fritsch and after 2 h MA in MAPF.
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