A new intermediate intercalate in superconducting sodium-doped hafnium nitride chloride.
A new phase has been observed during the sodium intercalation of hafnium nitride chloride as intermediate between the host beta-HfNCl and the already reported Na(0.29)HfNCl with Tc of 24 K; the new intermediate shows interlayer spacings ranging from 9.48 to 9.67 A, corresponds to a second stage intercalate of HfNCl and is superconducting with a critical temperature of 20 K.
Institut de Ciència de Materials de Barcelona, Campus U.A.B., 08193 Bellaterra, Spain.
Judith
J
Oró-Solé
Carlos
C
Frontera
Benjamín
B
Martínez
Daniel
D
Beltrán-Porter
Maria Rosa
MR
Palacín
Amparo
A
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