Co-existence of superconductivity and magnetism has been reported in certain regions of the Fe(Se,Te) phase diagram. Here, we address the key question of whether these different properties occur simultaneously within a homogeneous crystal or whether a “two-phase” description is more appropriate. Extensive microstructural analysis suggests that a Te-rich sample exhibiting both bulk superconductivity and magnetic order contains significant chemical and structural inhomogeneity, suggesting that the “two-phase” explanation may be valid in this sample. The high-resolution electron backscatter diffraction (HR-EBSD) technique has been used to map local changes in lattice parameter very precisely in these compounds.

1.
Y.
Kamihara
,
T.
Watanabe
,
M.
Hirano
, and
H.
Hosono
,
J. Am. Chem. Soc.
130
,
3296
(
2008
).
2.
M.
Rotter
,
D.
Tegel
, and
M.
Johrendt
,
Phys. Rev. Lett.
101
,
107006
(
2008
).
3.
M.
Pitcher
,
D.
Parker
,
P.
Adamson
,
S.
Herkelrath
,
A.
Boothroyd
,
R.
Ibberson
,
M.
Brunelli
, and
S.
Clarke
,
Chem. Commun.
45
,
5918
(
2008
).
4.
F.
Hsu
,
J.
Luo
,
K.
Yeh
,
T.
Chen
,
T.
Huang
,
P.
Wu
,
Y.
Lee
,
Y.
Huang
,
Y.
Chu
,
D.
Yan
, and
M.
Wu
,
Proc. Natl. Acad. Sci. U.S.A.
105
,
14262
(
2008
).
5.
M.
Fang
,
H.
Pham
,
B.
Qian
,
T.
Liu
,
E.
Vehstedt
,
Y.
Liu
,
L.
Spinu
, and
Z.
Mao
,
Phys. Rev. B
78
,
224503
(
2008
).
6.
S.
Speller
,
C.
Aksoy
,
M.
Saydam
,
H.
Taylor
,
G.
Burnell
,
A.
Boothroyd
, and
C.
Grovenor
,
Supercond. Sci. Technol.
24
,
075023
(
2011
).
7.
C.-Y.
Moon
and
H.
Choi
,
Phys. Rev. Lett.
104
,
057003
(
2010
).
8.
B.
Joseph
,
A.
Iadecola
,
L.
Simonelli
,
Y.
Mizuguchi
,
Y.
Takano
,
T.
Mizokawa
, and
N.
Saini
,
J. Phys. Condens. Matter
22
,
485702
(
2010
).
9.
W.
Bao
,
Y.
Qiu
,
Q.
Huang
,
M.
Green
,
P.
Zajdel
,
M.
Fitzsimmons
,
M.
Zhernenkov
,
S.
Chang
,
M.
Fang
,
B.
Qian
 et al,
Phys. Rev. Lett.
102
,
247001
(
2009
).
10.
T.
Liu
,
X.
Ke
,
B.
Qian
,
J.
Hu
,
D.
Fobes
,
E.
Vehstedt
,
H.
Pham
,
J.
Yang
,
M.
Fang
,
L.
Spinu
 et al,
Phys. Rev. B
80
,
174509
(
2009
).
11.
R.
Viennois
,
E.
Giannini
,
D.
van der Marel
, and
R.
Cerny
,
J. Solid State Chem.
183
,
769
(
2010
).
12.
M.
Bendele
,
P.
Babkevich
,
S.
Katrych
,
S.
Gvasaliya
,
E.
Pomjakushina
,
K.
Conder
,
B.
Roessli
,
A.
Boothroyd
,
R.
Khasanov
, and
H.
Keller
,
Phys. Rev. B
82
,
212504
(
2010
).
13.
M.
Bendele
,
S.
Weyeneth
,
R.
Puzniak
,
A.
Maisuradze
,
E.
Pomjakushina
,
K.
Conder
,
V.
Pomjakushin
,
H.
Luetkens
,
A.
Katrych
,
A.
Wisniewski
 et al,
Phys. Rev. B
81
,
224520
(
2010
).
14.
Y.
Mizuguchi
,
F.
Tomioka
,
S.
Tsuda
,
T.
Yamaguchi
, and
Y.
Takano
,
Appl. Phys. Lett.
93
,
152505
(
2008
).
15.
K.
Yeh
,
Z.
Huang
,
Y.
Huang
,
T.
Chen
,
F.
Hsu
,
P.
Wu
,
Y.
Lee
,
Y.
Chu
,
C.
Chen
,
J.
Luo
,
D.
Yan
, and
M.
Wu
,
Europhys. Lett.
84
,
37002
(
2008
).
16.
M.
Wu
,
F.
Hsu
,
K.
Yeh
,
T.
Huang
,
J.
Luo
,
M.
Wang
,
H.
Chang
,
T.
Chen
,
S.
Rao
,
B.
Mok
 et al,
Physica C
469
,
340
(
2009
).
17.
A.
Wilkinson
,
G.
Meaden
, and
D.
Dingley
,
Ultramicroscopy
106
,
307
(
2006
).
18.
T.
Liu
,
B.
Qian
,
D.
Fobes
,
Z.
Mao
,
W.
Bao
,
M.
Reehuis
,
S.
Kimber
,
K.
Prokes
,
S.
Matas
,
D.
Argyriou
 et al,
Nature Mater.
9
,
716
(
2010
).
19.
B.
Sales
,
A.
Sefat
,
M.
McGuire
,
R.
Jin
, and
J.
Mandraus
,
Phys. Rev. B
79
,
094521
(
2009
).
20.
See supplementary material at http://dx.doi.org/10.1063/1.3659302 for further details on the HR-EBSD method and fine-scale microstructural features present in the single crystals.

Supplementary Material

You do not currently have access to this content.