MgB2

Magnesium diboride (MgB2) is an inexpensive and simple superconductor. Its superconductivity was announced in the journal Nature in March 2001. Its critical temperature of 39 K is the highest amongst conventional superconductors. This material was first synthesized and its structure confirmed in 1953 but its superconducting properties were not discovered until half a century later.

Reference:
Text: Wikipedia

Crystallography

This work was a cooperation between the Physics of New Materials Group (ETH Zurich) and the High Pressure Materials Synthesis Group (ETH Zurich).
Reference:
Poster:
Structure/Properties Relationships in doped MgB2 single crystals
Authors: G. Schuck, M. Wörle, N.D. Zhigadlo, K. Rogacki, J. Karpinski
Conference: XX Congress of the International Union of Crystallography, August 23-31, 2005, Florence, Italy , PDF
Publication:
Strong magnetic pair breaking in Mn-substituted MgB2 single crystals
Authors: K. Rogacki, B. Batlogg, J. Karpinski, N. D. Zhigadlo, G. Schuck, S. M. Kazakov, P. Wägli, R. Puzniak, A. Wisniewski, F. Carbone, A. Brinkman, and D. van der Marel
Journal-ref: Phys. Rev. B, 73 (2006) 174520 , PDF
Publication:
Al substitution in MgB2 crystals: influence on superconducting and structural properties
Authors: J. Karpinski, N. D. Zhigadlo, G. Schuck, S. M. Kazakov, B. Batlogg, K. Rogacki, R. Puzniak, J. Jun, E. Müller, P. Wägli, R. Gonnelli, D. Daghero, G. A. Ummarino, V. A. Stepanov
Journal-ref: Phys. Rev. B, 71 (2005) 174506 , PDF