Anisotropy of conducting p states and B-11 nuclear spin-lattice relaxationin Mg1-xAlxB2 - art. no. 132506

Authors
Belashchenko, KD Antropov, VP Rashkeev, SN
Citation
Kd. Belashchenko et al., Anisotropy of conducting p states and B-11 nuclear spin-lattice relaxationin Mg1-xAlxB2 - art. no. 132506, PHYS REV B, 6413(13), 2001, pp. 2506
Citations number
15
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6413
Issue
13
Year of publication
2001
Database
ISI
SICI code
0163-1829(20011001)6413:13<2506:AOCPSA>2.0.ZU;2-O
Abstract
We calculated the nuclear spin-lattice relaxation rate in the Mg1-xAlxB2 sy stem and found that the orbital relaxation mechanism dominates over the dip olar and Fermi-contact mechanisms in MgB2 whereas in AlB2 due to a smaller density of states and strong anisotropy of boron p orbitals the relaxation is completely determined by Fermi-contact interaction. The results for MgB2 are compared with existing experimental data. To validate the theory, nucl ear resonance experiments for the studied diboride alloy system are needed.