Direct evidence for the occurrence of superconductivity in the magnetic compound YFe₄Al₈
For the first time we present the direct evidence for superconductivity in the ternary magnetic compound YFe₄Al₈ with the ThMn₁₂ type structure found via point-contact (PC) experiments on contacts between silver needle and single-crystal YFe₄Al₈, revealing the distinct Andreev-reflection current. Th...
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| Дата: | 2002 |
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| Автори: | , , , , , |
| Формат: | Стаття |
| Мова: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2002
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| Назва видання: | Физика низких температур |
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| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/130208 |
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| Цитувати: | Direct evidence for the occurrence of superconductivity in the magnetic compound YFe₄Al₈ / L.F. Rybaltchenko, P.Wyder, A.G. M. Jansen, V.M. Dmitriev N. N. Prentslau, W.Suski // Физика низких температур. — 2002. — Т. 28, № 4. — С. 374-377. — Бібліогр.: 14 назв. — англ. |
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irk-123456789-1302082018-02-10T03:03:06Z Direct evidence for the occurrence of superconductivity in the magnetic compound YFe₄Al₈ Rybaltchenko, L.F. Wyder, P. Jansen, A.G.M. Dmitriev, V.M. Prentslau, N.N. Suski, W. Свеpхпpоводимость, в том числе высокотемпеpатуpная For the first time we present the direct evidence for superconductivity in the ternary magnetic compound YFe₄Al₈ with the ThMn₁₂ type structure found via point-contact (PC) experiments on contacts between silver needle and single-crystal YFe₄Al₈, revealing the distinct Andreev-reflection current. The spectra measured prove the existence of normal-superconducting interface and exhibit the triangular-like shape in a vicinity of zero-bias voltage, inferring the unconventional type of superconductivity. The derived dependences of the order parameter versus temperature Δ(T) and m agnetic field Δ(H) are presented. Δ(T) follows BCS theory, whereas Δ(H) do not satisfy any theoretical predictions. In some cases there exists noticeable superconductivity enhancement by a weak magnetic field. The data obtained imply the v ery inhomogeneous distribution of superconductivity over the sample volume in spite of its single crystal structure. We assume that the reason is associated with inherent magnetic inhomogeneities of this material. The highest values for the critical temperature Tc, upper critical magnetic field Hc₂, and ratio 2Δ(0)/kTc are 7.4 K, 5 T, and 7.2, respectively. 2002 Article Direct evidence for the occurrence of superconductivity in the magnetic compound YFe₄Al₈ / L.F. Rybaltchenko, P.Wyder, A.G. M. Jansen, V.M. Dmitriev N. N. Prentslau, W.Suski // Физика низких температур. — 2002. — Т. 28, № 4. — С. 374-377. — Бібліогр.: 14 назв. — англ. 0132-6414 PACS: 74.70.Ad, 74.80.F http://dspace.nbuv.gov.ua/handle/123456789/130208 en Физика низких температур Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
Свеpхпpоводимость, в том числе высокотемпеpатуpная Свеpхпpоводимость, в том числе высокотемпеpатуpная |
| spellingShingle |
Свеpхпpоводимость, в том числе высокотемпеpатуpная Свеpхпpоводимость, в том числе высокотемпеpатуpная Rybaltchenko, L.F. Wyder, P. Jansen, A.G.M. Dmitriev, V.M. Prentslau, N.N. Suski, W. Direct evidence for the occurrence of superconductivity in the magnetic compound YFe₄Al₈ Физика низких температур |
| description |
For the first time we present the direct evidence for superconductivity in the ternary magnetic compound YFe₄Al₈ with the ThMn₁₂ type structure found via point-contact (PC) experiments on contacts between silver needle and single-crystal YFe₄Al₈, revealing the distinct Andreev-reflection current. The spectra measured prove the existence of normal-superconducting interface and exhibit the triangular-like shape in a vicinity of zero-bias voltage, inferring the unconventional type of superconductivity. The derived dependences of the order parameter versus temperature Δ(T) and m agnetic field Δ(H) are presented. Δ(T) follows BCS theory, whereas Δ(H) do not satisfy any theoretical predictions. In some cases there exists noticeable superconductivity enhancement by a weak magnetic field. The data obtained imply the v ery inhomogeneous distribution of superconductivity over the sample volume in spite of its single crystal structure. We assume that the reason is associated with inherent magnetic inhomogeneities of this material. The highest values for the critical temperature Tc, upper critical magnetic field Hc₂, and ratio 2Δ(0)/kTc are 7.4 K, 5 T, and 7.2, respectively. |
| format |
Article |
| author |
Rybaltchenko, L.F. Wyder, P. Jansen, A.G.M. Dmitriev, V.M. Prentslau, N.N. Suski, W. |
| author_facet |
Rybaltchenko, L.F. Wyder, P. Jansen, A.G.M. Dmitriev, V.M. Prentslau, N.N. Suski, W. |
| author_sort |
Rybaltchenko, L.F. |
| title |
Direct evidence for the occurrence of superconductivity in the magnetic compound YFe₄Al₈ |
| title_short |
Direct evidence for the occurrence of superconductivity in the magnetic compound YFe₄Al₈ |
| title_full |
Direct evidence for the occurrence of superconductivity in the magnetic compound YFe₄Al₈ |
| title_fullStr |
Direct evidence for the occurrence of superconductivity in the magnetic compound YFe₄Al₈ |
| title_full_unstemmed |
Direct evidence for the occurrence of superconductivity in the magnetic compound YFe₄Al₈ |
| title_sort |
direct evidence for the occurrence of superconductivity in the magnetic compound yfe₄al₈ |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
2002 |
| topic_facet |
Свеpхпpоводимость, в том числе высокотемпеpатуpная |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/130208 |
| citation_txt |
Direct evidence for the occurrence of superconductivity in the magnetic compound YFe₄Al₈ / L.F. Rybaltchenko, P.Wyder, A.G. M. Jansen, V.M. Dmitriev N. N. Prentslau, W.Suski // Физика низких температур. — 2002. — Т. 28, № 4. — С. 374-377. — Бібліогр.: 14 назв. — англ. |
| series |
Физика низких температур |
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2023-10-18T20:57:48Z |
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