Characterization of superconducting Fe y (Se1−x Te x ) thin films deposited on MgO substrates by sputtering
Source abstract
Abstract
We have investigated the feasibility of RF sputtering for the deposition of superconducting Fe y (Se1−x Te x ) (Fe-11) thin films on single-crystalline MgO substrates. Phase evolution and texture development as a function of processing conditions were studied, and the optimum conditions for high-quality films are reported. The epitaxial growth of the pure Fe-11 phase occurs in a temperature range of 300–320 °C with a critical film thickness of 50 nm. C-axis alignment is obtained in almost all processing conditions, while in-plane alignment is shown to be strongly dependent on the substrate temperature and the film thickness. When the substrate temperature exceeds 325 °C, an interlayer is formed between films and substrates which precludes epitaxial growth. Using sputtering with a single 3-element target, the deposited films tend to be enriched in Fe content and the excess Fe suppresses superconductivity, but a sharp transition at 10.2 K is found for the films with an Fe/(Se + Te) ratio close to 1.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Iron-based superconductors research · Corporate Taxation and Avoidance · Physics of Superconductivity and Magnetism
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (36)
Show source-provided references
1. Mizuguchi Y, Takano Y (2010) Review of Fe chalcogenides as the simplest Fe-based superconductor. J Phys Soc Jpn 79(10):102001–102019. doi: 10.1143/JPSJ.79.10200110.1143/JPSJ.79.102001 ↗
2. Coldea AI, Braithwaite D, Carrington A (2013) Iron-based superconductors in high magnetic fields. CR Phys 14(1):94–105. doi: 10.1016/j.crhy.2012.07.00310.1016/j.crhy.2012.07.003 ↗
3. Mousavi T, Grovenor CRM, Speller SC (2014) Structural parameters affecting superconductivity in iron chalcogenides: a review. Mater Sci Technol 30(15):1929–1943. doi: 10.1179/1743284714Y.000000055110.1179/1743284714Y.0000000551 ↗
4. Sefat AS (2011) Pressure effects on two superconducting iron-based families. Rep Prog Phys 74:124502–124516. doi: 10.1088/0034-4885/74/12/12450210.1088/0034-4885/74/12/124502 ↗
5. Yeh KW, Huang Y et al (2008) Tellurium substitution effect on superconductivity of the alpha-phase iron selenide. EPL 84(3):37002. doi: 10.1209/0295-5075/84/3700210.1209/0295-5075/84/37002 ↗
6. Tsukada I, Hanawa M et al (2011) Epitaxial growth of FeSe0.5Te0.5 thin films on CaF2 substrates with high critical current density. Appl Phys Exp 4:053101. doi: 10.1143/APEX.4.05310110.1143/APEX.4.053101 ↗
7. Si W, Lin ZW, Jie Q, Yin WG et al (2009) Enhanced superconducting transition temperature in FeSe0.5Te0.5 thin films. Appl Phys Lett 95(5):2504. doi: 10.1063/1.3195076
8. Bellingeri I, Buzio R, Gerbi A, Marre D, Cimberle MR, Tropeano M, Putti M, Palenzona A, Ferdeghini C (2010) T C = 21 K in epitaxial FeSe0.5Te0.5 thin films with biaxial compressive strain. Appl Phys Lett 96(10):2512. doi: 10.1063/1.335814810.1063/1.3358148 ↗
9. Qing-Yan W, Li Z et al (2012) Interface-induced high-temperature superconductivity in single unit-cell FeSe films on SrTiO3. Chin Phys Lett 29(3):037402. doi: 10.1088/0256-307X/29/3/03740210.1088/0256-307X/29/3/037402 ↗
10. Tsukada A, Luna KE, Hammond RH, Beasley MR, Zhao FJ, Risbud SH (2011) Pulsed laser deposition conditions and superconductivity of FeSe thin films. Appl Phys A 104(1):311–318. doi: 10.1007/s00339-010-6136-810.1007/s00339-010-6136-8 ↗
11. Bellingeri E, Buzio R, Gerbi A, Marre D, Congiu S, Cimberle MR, Tropeano M, Siri AS, Palenzona A, Ferdeghini C (2009) High quality epitaxial FeSe0.5Te0.5 thin films grown on SrTiO3 substrates by pulsed laser deposition. Supercond Sci Technol 22(10):5007. doi: 10.1088/0953-2048/22/10/10500710.1088/0953-2048/22/10/105007 ↗
12. Han Y, Li WY, Cao LX, Zhang S, Xu B, Zhao BR (2009) Preparation and superconductivity of iron selenide thin films. J Phys 21(23):5702. doi: 10.1088/0953-8984/21/23/235702
13. Huang SX, Chien CL, Thampy V, Broholm C (2010) Control of tetrahedral coordination and superconductivity in FeSe0.5Te0.5 thin films. Phys Rev Lett 104:217002. doi: 10.1103/PhysRevLett.104.21700210.1103/PhysRevLett.104.217002 ↗
14. Kumary TG, Baisnab DK, Janaki J, Mani A, Satya AT, Sarguna RM, Ajikumar PK, Tyagi AK, Bharathi A (2009) Superconducting Fe1+δ Se1−x Te x thin films: growth, characterization and properties. Supercond Sci Technol 22(9):5018. doi: 10.1088/0953-2048/22/9/095018
15. Yoshinori I, Akiike T, Hanawa M, Tsukada I, Ichinose A, Maeda A, Hikage T, Kawaguchi T, Ikuta H (2010) Systematic comparison of eight substrates in growth of FeSe0.5Te0.5 superconducting thin films. Appl Phys Exp 3:043102. doi: 10.1143/APEX.3.04310210.1143/APEX.3.043102 ↗
16. Agatsuma S, Yamagishi T, Takeda S, Naito M (2010) MBE growth of FeSe and Sr1−x K x Fe2As2. Phys C 470(20):1468–1472. doi: 10.1016/j.physc.2010.05.14010.1016/j.physc.2010.05.140 ↗
17. Jourdan M, Ten Haaf S (2010) Preparation, characterization, and upper critical field of epitaxial FeSe thin films. J Appl Phys 108:023913. doi: 10.1063/1.346508210.1063/1.3465082 ↗
18. Li L et al (2011) Superconductivity and magnetism in FeSe thin films grown by metal-organic chemical vapor deposition. Supercond Sci Technol 24(1):01501010.1088/0953-2048/24/1/015010 ↗
19. Schneider R et al (2013) Analysis of superconducting FeSe thin films deposited by a sputtering technique. Supercond Sci Technol 26(5):05501410.1088/0953-2048/26/5/055014 ↗
20. Speller SC, Aksoy C et al (2011) Analysis of FeySe1−x Te x thin films grown by radio frequency sputtering. Supercond Sci Technol 24(7):075023. doi: 10.1088/0953-2048/24/7/07502310.1088/0953-2048/24/7/075023 ↗
21. Mousavi T, Grovenor CRM, Speller SC (2015) Effects of processing conditions on the properties of Fe(Se,Te) thin films grown by sputtering. IEEE Trans Appl Supercond 25(3):1–4. doi: 10.1109/TASC.2014.237365610.1109/TASC.2014.2373656 ↗
22. Hägg G, Kindstrom AL (1933) Z Phys Chem B 22:455
23. Okamoto H (2010) Phase diagrams for binary alloys, 2nd edn. SM Intl, Materials Park
24. Hiramatsu H, Katase T, Kamiya T, Hirano M, Hosono H (2009) Water-induced superconductivity in SrFe2As2. Phys Rev B 80(5):52501. doi: 10.1103/PhysRevB.80.05250110.1103/PhysRevB.80.052501 ↗
25. Authier A (2013) Early days of X-ray crystallography. Oxford University Press, Oxford10.1093/acprof:oso/9780199659845.001.0001 ↗
26. Hanawa M, Ichionse A et al (2012) Empirical selection rule of substrate materials for iron chalcogenide superconducting thin films. Jpn J Appl Phys 51:010104. doi: 10.1143/JJAP.51.01010410.7567/JJAP.51.010104 ↗
27. Hanawa M, Komiya S, Tsukada I, Akiike T, Imai Y, Hikage T, Kawaguchi T, Ikuta H, Maeda A (2011) Substrate dependence of structural and transport properties in FeSe0.5Te0.5 thin films. Jpn J Appl Phys 50:053101. doi: 10.1143/JJAP.50.05310110.7567/JJAP.50.053101 ↗
28. McQueen TM et al (2009) Extreme sensitivity of superconductivity to stoichiometry in FeSe. Phys Rev B 79:014522. doi: 10.1103/PhysRevB.79.01452210.1103/PhysRevB.79.014522 ↗
29. Yeh KW, Hsu HC, Huang TW, Wu PM, Huang YL, Chen TK, Luo JY, Wu MK (2008) Se and Te doping study of the FeSe superconductors. J Phys Soc Jpn 77:19–22. doi: 10.1143/JPSJS.77SC.1910.1143/JPSJS.77SC.19 ↗
30. Medvedev S, McQueen TM, Troyan IA, Palasyuk T, Eremets MI, Cava RJ, Naghavi S, Casper F, Ksenofontov V, Wortmann G, Felser C (2009) Electronic and magnetic phase diagram of β-Fe1.01Se with superconductivity at 36.7 K under pressure. Nat Mater 8:630. doi: 10.1038/NMAT249110.1038/nmat2491 ↗
31. Sugibuchi K, Kurogi Y, Endo N (1975) Ferroelectric field-effect memory device using Bi4Ti3O12 film. J Appl Phys 46(7):2877–2881. doi: 10.1063/1.32201410.1063/1.322014 ↗
32. Baek JS, Kim YJ (2006) Cooling effect enhancement in magnetron sputtering system. In: Fifth international conference on CFD in the Process Industries, Melbourne
33. Sarkar J (2013) Sputtering materials for VLSI and thin film devices. William Andrew, Elsevier, Norwich
34. Billard A, Mercs D, Perry F, Frantz C (1999) Influence of the target temperature on a reactive sputtering process. Surf Coat Technol 116:721–726. doi: 10.1016/S0257-8972(99)00261-310.1016/S0257-8972(99)00261-3 ↗
35. Kelly PJ, Arnell RD (2000) Magnetron sputtering: a review of recent developments and applications. Vacuum 56(3):159–172. doi: 10.1016/S0042-207X(99)00189-X10.1016/S0042-207X(99)00189-X ↗
36. Hsu FC, Lui JY, Yeh KW et al (2008) Superconductivity in the PbO-type structure a-FeSe. Proc Natl Acad Sci 105(38):14262–14264. doi: 10.1073/pnas.080732510510.1073/pnas.0807325105 ↗