Abstract
We report on synthesis, structural characterization, resistivity, magnetic and thermal expansion measurements on the as yet unexplored δ’-phase of FeSe1 -x , here synthesized under ambient- (AP) and high-pressure (HP) conditions. We show that in contrast to β-FeSe1 -x , monophasic superconducting δ’-FeSe1 -x can be obtained in off-stoichiometric samples with excess Fe atoms preferentially residing in the van der Waals gap between the FeSe layers. The AP δ’-FeSe1 -x sample studied here (T c \(\simeq\) 8.5 K) possesses an unprecedented residual resistivity ratio RRR \(\simeq\) 16. Thermal expansion data reveal a small feature around ~90 K, which resembles the anomaly observed at the structural and magnetic transitions for other Fe-based superconductors, suggesting that some kind of “magnetic state” is formed also in FeSe. For HP samples (RRR \(\simeq\) 3), the disorder within the FeSe layers is enhanced through the introduction of vacancies, the saturated magnetic moment of Fe is reduced and only spurious superconductivity is observed.
Similar content being viewed by others
References
Y. Kamihara, T. Watanabe, M. Hirano, H. Hosono, J. Am. Chem. Soc. 130, 3296 (2008)
X.H. Chen, T. Wu, G. Wu, R.H. Liu, H. Chen, D.F. Fang, Nature 453, 761 (2008)
M. Rotter, M. Tegel, D. Johrendt, Phys. Rev. Lett. 101, 107006 (2008)
X.C. Wang, Q.Q. Liu, Y.X. Lv, W.B. Gao, L.X. Yang, R.C. Yu, F.Y. Li, C.Q. Jin, Solid State Commun. 148, 538 (2008)
F.-C. Hsu, J.-Y. Luo, K.-W. Yeh, T.-K. Chen, T.-W. Huang, P.M. Wu, Y.-C. Lee, Y.-L. Huang, Y.-Y. Chu, D.-C. Yan, M.K. Wu, Proc. Natl. Acad. Sci. USA 105, 1462 (2008)
K. Ishida, Y. Nakai, H. Hosono, J. Phys. Soc. Jpn. 78, 062001 (2009)
D.C. Johnston, e-print arXiv:1005.4392 (2010)
T.M. McQueen, A.J. Williams, P.W. Stephens, J. Tao, Y. Zhu, V. Ksenofontov, F. Casper, C. Felser, R.J. Cava, Phys. Rev. Lett. 103, 057002 (2009)
T. Imai, K. Ahilan, F.L. Ning, T.M. McQueen, R.J. Cava, Phys. Rev. Lett. 102, 177005 (2009)
A. Jesche, C. Krellner, M. de Souza, M. Lang, C. Geibel, Phys. Rev. B. 81, 134525 (2010)
B. Büchner, C. Hess, Nat. Mater. 8, 615 (2009)
T.M. McQueen, Q. Huang, V. Ksenofontov, C. Felser, Q. Xu, H. Zandbergen, Y.S. Hor, J. Allred, A.J. Williams, D. Qu, J. Checkelsky, N.P. Ong, R.J. Cava, Phys. Rev. B 79, 014522 (2008)
A.J. Williams, T.M. McQueen, R.J. Cava, Solid State Commun. 149, 1507 (2009)
Y. Mizuguchi, F. Tomioka, S. Tsuda, T. Yamaguchi, Y. Takano, J. Phys. Soc. Jpn. 78, 074712 (2009)
A.J. Williams, T.M. McQueen, V. Ksenofontov, C. Felser, R.J. Cava, J. Phys.: Condens. Matter 21, 305701 (2009)
S. Medvedev, T.M. McQueen, I.A. Troyan, T. Palasyuk, M.I. Eremets, R.J. Cava, S. Naghavi, F. Casper, V. Ksenofontov, G. Wortmann, C. Felser, Nat. Mat. 8, 576 (2009)
V.A. Sidorov, A.V. Tsvyashschenko, R.A. Sadykov, e-print arXiv:0903.2873 (2009)
W. Schuster, H. Mikler, K. Komarek, Monatshefte für Chemie 110, 1153 (1979)
S.R. Svendsen, Acta Chem. Scand. 26, 3757 (1972)
A.N. Nesmeyanov, Vapor pressure of chemical elements (Elsevier publishing company, Washington D.C., 1963)
A.A. Haghighirad, F. Ritter, W. Assmus, Cryst. Growth Des. 8, 1961 (2008)
A.C. Larsen, R.B. von Dreele, GSAS software, Los Alamos National Laboratory Report No. LAUR 86-748
J.L. Pimentel, A.R. Jurelo, C.E. Forster, P.R. Júnior, R.M. Costa, Physica C (in press) doi:10.1016/ j.physc.2009.11.153 (2009)
M. Tisza, Physical Metallurgy for Engineers (ASM International and Freund Publishing House Ltda., London, Tel Aviv, 2001)
γ-Fe crystallizes in space group F\(m \bar{3} m\) (No. 225), see M.E. Straumanis, D.C. Kim, Zeitschrift fuer Metallkunde 60, 272 (1969)
R. Pott, R. Schefzyk, J. Phys. E 16, 445 (1983)
S. Masaki, H. Kotegawa, Y. Hara, H. Tou, K. Murata, Y. Mizuguchi, Y. Takano, J. Phys. Soc. Jpn. 78, 063704 (2009)
S. Margadonna, Y. Takabayashi, Y. Ohishi, Y. Mizuguchi, Y. Takano, T. Kagayama, T. Nakagawa, M. Takata, K. Prassides, Phys. Rev. B 80, 064506 (2009)
G. Garbarino, A. Sow, P. Lejay, A. Sulpice, P. Toulemonde, M. Mezouar, M. Nuñes-Regueiro, Eur. Phys. Lett. 86, 27001 (2009)
Y. Mizuguchi, F. Tomioka, S. Tsuda, T. Yamaguchi, Y. Takano, Appl. Phys. Lett. 93, 152505 (2008)
C.-L. Huang, C.-C. Chou, K.-F. Tseng, Y.-L. Huang, F.-C. Hsu, K.-W. Yeh, M.-K. Wu, H.-D. Yang, J. Phys. Soc. Jpn. 78, 084710 (2009)
W. Yu, A.A. Aczel, T.J. Williams, S.L. Budko, N. Ni, P.C. Canfield, G.M. Luke, Phys. Rev. B 79, 020511(R) (2009)
R. Klingeler, L. Wang, U. Kohler, G. Behr, C. Hess, B. Büchner, J. Phys.: Conf. Ser. 200, 012088 (2010)
S.L. Bud’ko, N. Ni, S. Nandi, G.M. Schmiedeshoff, P.C. Canfield, Phys. Rev. B 79, 054525 (2009)
U. Patel, J. Hua, S.H. Yu, S. Avci, Z.L. Xiao, H. Claus, J. Schlueter, V.V. Vlasko-Vlasov, U. Welp, W.K. Kwok, Appl. Phys. Lett. 94, 082508 (2009)
S. Margadonna, Y. Takabayashi, M.T. McDonald, K. Kasperkiewicz, Y. Y. Mizuguchi, Y. Takano, A.N. Fitch, E. Suard, K. Prassides, Chem. Commun. 43, 5608 (2008)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
de Souza, M., Haghighirad, AA., Tutsch, U. et al. Synthesis, structural and physical properties of δ’-FeSe1 -x . Eur. Phys. J. B 77, 101–107 (2010). https://doi.org/10.1140/epjb/e2010-00254-7
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1140/epjb/e2010-00254-7