Evolution of superconductivity and weak magnetism in inclination interfaces of Bi, Sb and Bi1-xSbx (0.07 ≤x ≤ 0.2) alloys
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MUNTYANU, Fiodor M., NENKOV , Konstantin A., ZALESKI, Andrzej Janusz, MUNTEAN (SLOBODEANU), Neli, CHISTOL, Vitalie. Evolution of superconductivity and weak magnetism in inclination interfaces of Bi, Sb and Bi1-xSbx (0.07 ≤x ≤ 0.2) alloys. In: Solid State Communications, 2019, vol. 299, pp. 1-5. ISSN 0038-1098. DOI: https://doi.org/10.1016/j.ssc.2019.113660
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Solid State Communications
Volumul 299 / 2019 / ISSN 0038-1098 /ISSNe 1879-2766

Evolution of superconductivity and weak magnetism in inclination interfaces of Bi, Sb and Bi1-xSbx (0.07 ≤x ≤ 0.2) alloys

DOI:https://doi.org/10.1016/j.ssc.2019.113660

Pag. 1-5

Muntyanu Fiodor M.1, Nenkov Konstantin A.2, Zaleski Andrzej Janusz3, Muntean (Slobodeanu) Neli4, Chistol Vitalie5
 
1 Institute of the Electronic Engineering and Nanotechnologies "D. Ghitu",
2 Leibniz Institute for Solid State and Materials Reseach, Dresden,
3 Institute of Low Temperatures and Structural Research, PAS,
4 Academy of Economic Studies of Moldova,
5 Technical University of Moldova
 
 
Disponibil în IBN: 2 iulie 2019


Rezumat

Using Quantum Design SQUID magnetometer, we studied the magnetic and superconducting properties of high quality inclination bicrystal interfaces of Bi, Sb and 3D topological insulator Bi1-xSbx (0.06 ≤ x ≤ 0.2). One or two superconducting phases with Tc ≤ 21 K and magnetic hysteresis loops on a diamagnetic background typical for strong type II superconductors were identified in Bi and some Bi-Sb nano-width interfaces. However, the other interfaces of Bi1-xSbx (0.06 ≤ x ≤ 0.2) as well as of Sb with a higher carrier density exhibit a superconducting transition and a ferromagnetic hysteresis loop or a dual loop (superimposed ferromagnetic and superconducting loops) against a paramagnetic background and thereby indicate the occurrence of superconductivity and weak ferromagnetism.

Cuvinte-cheie
A. bicrystal interface, A. bismuth, Antimony, bismuth-antimony alloys, D. 3D topological insulator, D. superconductivity and ferromagnetism

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<title xml:lang='en'>Evolution of superconductivity and weak magnetism in inclination interfaces of Bi, Sb and Bi1-xSbx (0.07 &le;x &le; 0.2) alloys</title>
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<subject>A. bicrystal interface</subject>
<subject>A. bismuth</subject>
<subject>Antimony</subject>
<subject>bismuth-antimony alloys</subject>
<subject>D. 3D topological insulator</subject>
<subject>D. superconductivity and ferromagnetism</subject>
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<description xml:lang='en' descriptionType='Abstract'><p>Using Quantum Design SQUID magnetometer, we studied the magnetic and superconducting properties of high quality inclination bicrystal interfaces of Bi, Sb and 3D topological insulator Bi<sub>1-x</sub>Sb<sub>x</sub> (0.06 &le; x &le; 0.2). One or two superconducting phases with T<sub>c</sub> &le; 21 K and magnetic hysteresis loops on a diamagnetic background typical for strong type II superconductors were identified in Bi and some Bi-Sb nano-width interfaces. However, the other interfaces of Bi<sub>1-x</sub>Sb<sub>x</sub> (0.06 &le; x &le; 0.2) as well as of Sb with a higher carrier density exhibit a superconducting transition and a ferromagnetic hysteresis loop or a dual loop (superimposed ferromagnetic and superconducting loops) against a paramagnetic background and thereby indicate the occurrence of superconductivity and weak ferromagnetism.</p></description>
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