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Oxypnictide

January 01, 1970

In chemistry, oxypnictides are a class of materials composed of oxygen, a pnictogen (group-V, especially phosphorus and arsenic) and one or more other elements. Although this group of compounds has been recognized since 1995,[1] interest in these compounds increased dramatically after the publication of the superconducting properties of LaOFeP and LaOFeAs which were discovered in 2006[2] and 2008.[3][4] In these experiments the oxide was partly replaced by fluoride.

These and related compounds (e.g. the 122 iron arsenides) form a new group of iron-based superconductors known as iron pnictides or ferropnictides since the oxygen is not essential but the iron seems to be.

Oxypnictides have been patented as magnetic semiconductors in early 2006.[5]

The different subclasses of oxypnictides are oxynitrides, oxyphosphides, oxyarsenides, oxyantimonides, and oxybismuthides.

Structure edit

Many of the oxypnictides show a layered structure.[6] For example, LaFePO with layers of La3+O2− and Fe2+P3−.[2] This structure is similar to that of ZrCuSiAs, which is now the parent structure for most of the oxypnictide.[7]

Superconductivity edit

The first superconducting iron oxypnictide was discovered in 2006, based on phosphorus.[2] A drastic increase in the critical temperature was achieved when phosphorus was substituted by arsenic.[3] This discovery boosted the search for similar compounds, like the search for cuprate-based superconductors after their discovery in 1986.

The superconductivity of the oxypnictides seems to depend on the iron-pnictogen layers.

Some found in 2008 to be high-temperature superconductors (up to 55 K) of composition ReOTmPn, where Re is a rare earth, Tm is a transition metal and Pn is from group V e.g. As.[8]

oxypnictides
Material Tc (K)
LaO0.89F0.11FeAs 26[9]
LaO0.9F0.2FeAs 28.5[10]
CeFeAsO0.84F0.16 41[9]
SmFeAsO0.9F0.1 43[9]
La0.5Y0.5FeAsO0.6 43.1[11]
NdFeAsO0.89F0.11 52[9]
PrFeAsO0.89F0.11 52[12]
GdFeAsO0.85 53.5[13]
SmFeAsO~0.85 55[14]

Tests in magnetic fields up to 45 teslas[15][16] suggest the upper critical field of LaFeAsO0.89F0.11 may be around 64 T. A different lanthanum-based material tested at 6 K predicts an upper critical field of 122 T in La0.8K0.2FeAsO0.8F0.2.[10]

Practical use edit

Because of the brittleness of the oxypnictides, superconducting wires are formed using the powder-in-tube process (using iron tubes).[17]

See also edit

 
Wikimedia Commons has media related to Oxypnictides.

References edit

  1. ^ Zimmer, Barbara I.; Jeitschko, Wolfgang; Albering, Jörg H.; Glaum, Robert; Reehuis, Manfred (1995). "The rate earth transition metal phosphide oxides LnFePO, LnRuPO and LnCoPO with ZrCuSiAs type structure". Journal of Alloys and Compounds. 229 (2): 238–242. doi:10.1016/0925-8388(95)01672-4.
  2. ^ a b c Kamihara, Y; Hiramatsu, H; Hirano, M; Kawamura, R; Yanagi, H; Kamiya, T; Hosono, H (2006). "Iron-Based Layered Superconductor: LaOFeP". J. Am. Chem. Soc. 128 (31): 10012–10013. doi:10.1021/ja063355c. PMID 16881620.
  3. ^ a b Takahashi, H; Igawa, K; Arii, K; Kamihara, Y; Hirano, M; Hosono, H (2008). "Superconductivity at 43 K in an iron-based layered compound LaO1−xFxFeAs". Nature. 453 (7193): 376–378. Bibcode:2008Natur.453..376T. doi:10.1038/nature06972. PMID 18432191. S2CID 498756.
  4. ^ Day, Charles (2008). "New family of quaternary iron-based compounds superconducts at tens of kelvin". Physics Today. 61 (5): 11–12. Bibcode:2008PhT....61e..11D. doi:10.1063/1.2930719.
  5. ^ H. Hosono et al. (2006) Magnetic semiconductor material European Patent Application EP1868215
  6. ^ Ozawa, T. C.; Kauzlarich, S. M. (2008). "Chemistry of layered d-metal pnictide oxides and their potential as candidates for new superconductors". Sci. Technol. Adv. Mater. 9 (3): 033003. arXiv:0808.1158. Bibcode:2008STAdM...9c3003O. doi:10.1088/1468-6996/9/3/033003. PMC 5099654. PMID 27877997.
  7. ^ Tegel, Marcus; Bichler, Daniel; Johrendt, Dirk (2008). "Synthesis, crystal structure and superconductivity of LaNiPO". Solid State Sciences. 10 (2): 193–197. Bibcode:2008SSSci..10..193T. doi:10.1016/j.solidstatesciences.2007.08.016.
  8. ^ Ren, Z. A.; Yang, J.; Lu, W.; Yi, W.; Che, G. C.; Dong, X. L.; Sun, L. L.; Zhao, Z. X. (2008). "Samarium based SmFeAsO1−xFx". Materials Research Innovations. 12 (3): 105. arXiv:0803.4283. Bibcode:2008MatRI..12..105R. doi:10.1179/143307508X333686. S2CID 55488705.
  9. ^ a b c d Ishida, Kenji; Nakai, Yusuke; Hosono, Hideo (2009). "To What Extent Iron-Pnictide New Superconductors Have Been Clarified: A Progress Report". J. Phys. Soc. Jpn. 78 (6): 062001. arXiv:0906.2045. Bibcode:2009JPSJ...78f2001I. doi:10.1143/JPSJ.78.062001. S2CID 119295430.
  10. ^ a b Prakash, J.; Singh, S. J.; Samal, S. L.; Patnaik, S.; Ganguli, A. K. (2008). "Potassium fluoride doped LaOFeAs multi-band superconductor: Evidence of extremely high upper critical field". EPL. 84 (5): 57003. Bibcode:2008EL.....8457003P. doi:10.1209/0295-5075/84/57003. S2CID 119254951.
  11. ^ Shirage, Parasharam M.; Miyazawa, Kiichi; Kito, Hijiri; Eisaki, Hiroshi; Iyo, Akira (2008). "Superconductivity at 43 K at ambient pressure in the iron-based layered compound La1‑xYxFeAsOy". Physical Review B. 78 (17): 172503. Bibcode:2008PhRvB..78q2503S. doi:10.1103/PhysRevB.78.172503.
  12. ^ Ren, Z. A.; Yang, J.; Lu, W.; Yi, W.; Che, G. C.; Dong, X. L.; Sun, L. L.; Zhao, Z. X. (2008). "Superconductivity at 52 K in iron based F doped layered quaternary compound Pr[O1–xFx]FeAs". Materials Research Innovations. 12 (3): 105. arXiv:0803.4283. Bibcode:2008MatRI..12..105R. doi:10.1179/143307508X333686. S2CID 55488705.
  13. ^ Yang, Jie; Li, Zheng-Cai; Lu, Wei; Yi, Wei; Shen, Xiao-Li; Ren, Zhi-An; Che, Guang-Can; Dong, Xiao-Li; Sun, Li-Ling; et al. (2008). "Superconductivity at 53.5 K in GdFeAsO1−δ". Superconductor Science and Technology. 21 (8): 082001. arXiv:0804.3727. Bibcode:2008SuScT..21h2001Y. doi:10.1088/0953-2048/21/8/082001. S2CID 121990600.
  14. ^ Ren, Zhi-An; Che, Guang-Can; Dong, Xiao-Li; Yang, Jie; Lu, Wei; Yi, Wei; Shen, Xiao-Li; Li, Zheng-Cai; Sun, Li-Ling; Zhou, Fang; Zhao, Zhong-Xian (2008). "Superconductivity and phase diagram in iron-based arsenic-oxides ReFeAsO1−δ (Re = rare-earth metal) without fluorine doping". EPL. 83 (1): 17002. arXiv:0804.2582. Bibcode:2008EL.....8317002R. doi:10.1209/0295-5075/83/17002. S2CID 96240327.
  15. ^ "High-temp superconductors pave way for 'supermagnets'". planetanalog. May 29, 2008.[permanent dead link]
  16. ^ Hunte, F; Jaroszynski, J; Gurevich, A; Larbalestier, D. C.; Jin, R; Sefat, A. S.; McGuire, M. A.; Sales, B. C.; Christen, D. K.; Mandrus, D (2008). "Two-band superconductivity in LaFeAsO0.89F0.11 at very high magnetic fields". Nature. 453 (7197): 903–905. arXiv:0804.0485. Bibcode:2008Natur.453..903H. doi:10.1038/nature07058. PMID 18509332. S2CID 115211939.
  17. ^ Gao, Zhaoshun; Wang, Lei; Qi, Yanpeng; Wang, Dongliang; Zhang, Xianping; Ma, Yanwei (2008). "Preparation of LaFeAsO0.9F0.1 wires by the powder-in-tube method". Superconductor Science and Technology. 21 (10): 105024. Bibcode:2008SuScT..21j5024G. doi:10.1088/0953-2048/21/10/105024. S2CID 122471407.

External links edit

  • Hosono at JST Has diagram of LaO & FeAs layers in LaOFeAs

January 01, 1970
oxypnictide, chemistry, oxypnictides, class, materials, composed, oxygen, pnictogen, group, especially, phosphorus, arsenic, more, other, elements, although, this, group, compounds, been, recognized, since, 1995, interest, these, compounds, increased, dramatic. In chemistry oxypnictides are a class of materials composed of oxygen a pnictogen group V especially phosphorus and arsenic and one or more other elements Although this group of compounds has been recognized since 1995 1 interest in these compounds increased dramatically after the publication of the superconducting properties of LaOFeP and LaOFeAs which were discovered in 2006 2 and 2008 3 4 In these experiments the oxide was partly replaced by fluoride These and related compounds e g the 122 iron arsenides form a new group of iron based superconductors known as iron pnictides or ferropnictides since the oxygen is not essential but the iron seems to be Oxypnictides have been patented as magnetic semiconductors in early 2006 5 The different subclasses of oxypnictides are oxynitrides oxyphosphides oxyarsenides oxyantimonides and oxybismuthides Contents 1 Structure 2 Superconductivity 3 Practical use 4 See also 5 References 6 External linksStructure editMany of the oxypnictides show a layered structure 6 For example LaFePO with layers of La3 O2 and Fe2 P3 2 This structure is similar to that of ZrCuSiAs which is now the parent structure for most of the oxypnictide 7 Superconductivity editThe first superconducting iron oxypnictide was discovered in 2006 based on phosphorus 2 A drastic increase in the critical temperature was achieved when phosphorus was substituted by arsenic 3 This discovery boosted the search for similar compounds like the search for cuprate based superconductors after their discovery in 1986 The superconductivity of the oxypnictides seems to depend on the iron pnictogen layers Some found in 2008 to be high temperature superconductors up to 55 K of composition ReOTmPn where Re is a rare earth Tm is a transition metal and Pn is from group V e g As 8 oxypnictides Material Tc K LaO0 89F0 11FeAs 26 9 LaO0 9F0 2FeAs 28 5 10 CeFeAsO0 84F0 16 41 9 SmFeAsO0 9F0 1 43 9 La0 5Y0 5FeAsO0 6 43 1 11 NdFeAsO0 89F0 11 52 9 PrFeAsO0 89F0 11 52 12 GdFeAsO0 85 53 5 13 SmFeAsO 0 85 55 14 Tests in magnetic fields up to 45 teslas 15 16 suggest the upper critical field of LaFeAsO0 89F0 11 may be around 64 T A different lanthanum based material tested at 6 K predicts an upper critical field of 122 T in La0 8K0 2FeAsO0 8F0 2 10 Practical use editBecause of the brittleness of the oxypnictides superconducting wires are formed using the powder in tube process using iron tubes 17 See also edit nbsp Wikimedia Commons has media related to Oxypnictides Charge transfer complex Association of molecules in which a fraction of electronic charge is transferred between them Color superconductivity Predicted phase in quark matter in quarks Kondo effect Physical phenomenon due to impurities Magnetic sail Proposed spacecraft propulsion method National Superconducting Cyclotron Laboratory Building in Michigan United States Spallation Neutron Source Accelerator based neutron source in Oak Ridge Tennessee USA Superconducting radio frequency Technique used to attain a high quality factor in resonant cavities Superfluid film Thin layer of liquid in a superfluid state Timeline of low temperature technologyReferences edit Zimmer Barbara I Jeitschko Wolfgang Albering Jorg H Glaum Robert Reehuis Manfred 1995 The rate earth transition metal phosphide oxides LnFePO LnRuPO and LnCoPO with ZrCuSiAs type structure Journal of Alloys and Compounds 229 2 238 242 doi 10 1016 0925 8388 95 01672 4 a b c Kamihara Y Hiramatsu H Hirano M Kawamura R Yanagi H Kamiya T Hosono H 2006 Iron Based Layered Superconductor LaOFeP J Am Chem Soc 128 31 10012 10013 doi 10 1021 ja063355c PMID 16881620 a b Takahashi H Igawa K Arii K Kamihara Y Hirano M Hosono H 2008 Superconductivity at 43 K in an iron based layered compound LaO1 xFxFeAs Nature 453 7193 376 378 Bibcode 2008Natur 453 376T doi 10 1038 nature06972 PMID 18432191 S2CID 498756 Day Charles 2008 New family of quaternary iron based compounds superconducts at tens of kelvin Physics Today 61 5 11 12 Bibcode 2008PhT 61e 11D doi 10 1063 1 2930719 H Hosono et al 2006 Magnetic semiconductor material European Patent Application EP1868215 Ozawa T C Kauzlarich S M 2008 Chemistry of layered d metal pnictide oxides and their potential as candidates for new superconductors Sci Technol Adv Mater 9 3 033003 arXiv 0808 1158 Bibcode 2008STAdM 9c3003O doi 10 1088 1468 6996 9 3 033003 PMC 5099654 PMID 27877997 Tegel Marcus Bichler Daniel Johrendt Dirk 2008 Synthesis crystal structure and superconductivity of LaNiPO Solid State Sciences 10 2 193 197 Bibcode 2008SSSci 10 193T doi 10 1016 j solidstatesciences 2007 08 016 Ren Z A Yang J Lu W Yi W Che G C Dong X L Sun L L Zhao Z X 2008 Samarium based SmFeAsO1 xFx Materials Research Innovations 12 3 105 arXiv 0803 4283 Bibcode 2008MatRI 12 105R doi 10 1179 143307508X333686 S2CID 55488705 a b c d Ishida Kenji Nakai Yusuke Hosono Hideo 2009 To What Extent Iron Pnictide New Superconductors Have Been Clarified A Progress Report J Phys Soc Jpn 78 6 062001 arXiv 0906 2045 Bibcode 2009JPSJ 78f2001I doi 10 1143 JPSJ 78 062001 S2CID 119295430 a b Prakash J Singh S J Samal S L Patnaik S Ganguli A K 2008 Potassium fluoride doped LaOFeAs multi band superconductor Evidence of extremely high upper critical field EPL 84 5 57003 Bibcode 2008EL 8457003P doi 10 1209 0295 5075 84 57003 S2CID 119254951 Shirage Parasharam M Miyazawa Kiichi Kito Hijiri Eisaki Hiroshi Iyo Akira 2008 Superconductivity at 43 K at ambient pressure in the iron based layered compound La1 xYxFeAsOy Physical Review B 78 17 172503 Bibcode 2008PhRvB 78q2503S doi 10 1103 PhysRevB 78 172503 Ren Z A Yang J Lu W Yi W Che G C Dong X L Sun L L Zhao Z X 2008 Superconductivity at 52 K in iron based F doped layered quaternary compound Pr O1 xFx FeAs Materials Research Innovations 12 3 105 arXiv 0803 4283 Bibcode 2008MatRI 12 105R doi 10 1179 143307508X333686 S2CID 55488705 Yang Jie Li Zheng Cai Lu Wei Yi Wei Shen Xiao Li Ren Zhi An Che Guang Can Dong Xiao Li Sun Li Ling et al 2008 Superconductivity at 53 5 K in GdFeAsO1 d Superconductor Science and Technology 21 8 082001 arXiv 0804 3727 Bibcode 2008SuScT 21h2001Y doi 10 1088 0953 2048 21 8 082001 S2CID 121990600 Ren Zhi An Che Guang Can Dong Xiao Li Yang Jie Lu Wei Yi Wei Shen Xiao Li Li Zheng Cai Sun Li Ling Zhou Fang Zhao Zhong Xian 2008 Superconductivity and phase diagram in iron based arsenic oxides ReFeAsO1 d Re rare earth metal without fluorine doping EPL 83 1 17002 arXiv 0804 2582 Bibcode 2008EL 8317002R doi 10 1209 0295 5075 83 17002 S2CID 96240327 High temp superconductors pave way for supermagnets planetanalog May 29 2008 permanent dead link Hunte F Jaroszynski J Gurevich A Larbalestier D C Jin R Sefat A S McGuire M A Sales B C Christen D K Mandrus D 2008 Two band superconductivity in LaFeAsO0 89F0 11 at very high magnetic fields Nature 453 7197 903 905 arXiv 0804 0485 Bibcode 2008Natur 453 903H doi 10 1038 nature07058 PMID 18509332 S2CID 115211939 Gao Zhaoshun Wang Lei Qi Yanpeng Wang Dongliang Zhang Xianping Ma Yanwei 2008 Preparation of LaFeAsO0 9F0 1 wires by the powder in tube method Superconductor Science and Technology 21 10 105024 Bibcode 2008SuScT 21j5024G doi 10 1088 0953 2048 21 10 105024 S2CID 122471407 External links editHosono at JST Has diagram of LaO amp FeAs layers in LaOFeAs Retrieved from https en wikipedia org w index php title Oxypnictide amp oldid 1193814004, wikipedia, wiki, book, books, library,

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