TY - JOUR
T1 - Ferromagnetism and piezomagnetic behavior in Mn-doped germanium nanotubes
AU - Singh, Abhishek Kumar
AU - Kumar, Vijay
AU - Kawazoe, Yoshiyuki
PY - 2004/6/1
Y1 - 2004/6/1
N2 - Using ab initio density functional calculations, we show that pentagonal and hexagonal nanotubes of Ge can be stabilized in the antiprism structure by doping with Mn atoms. In both cases the infinite nanotubes are metallic and ferromagnetic. Hexagonal nanotubes have the highest average magnetic moments of 3.06 μB per Mn atom found so far in metal doped nanotubes of semiconductors, while the pentagonal nanotubes show a transition from a ferromagnetic to a ferrimagnetic state upon compression with an abrupt change in the magnetic moments, leading to the possibility of these nanotubes to act as a nano-piezomagnet.
AB - Using ab initio density functional calculations, we show that pentagonal and hexagonal nanotubes of Ge can be stabilized in the antiprism structure by doping with Mn atoms. In both cases the infinite nanotubes are metallic and ferromagnetic. Hexagonal nanotubes have the highest average magnetic moments of 3.06 μB per Mn atom found so far in metal doped nanotubes of semiconductors, while the pentagonal nanotubes show a transition from a ferromagnetic to a ferrimagnetic state upon compression with an abrupt change in the magnetic moments, leading to the possibility of these nanotubes to act as a nano-piezomagnet.
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U2 - 10.1103/PhysRevB.69.233406
DO - 10.1103/PhysRevB.69.233406
M3 - Article
AN - SCOPUS:42749102079
VL - 69
SP - 233406-1-233406-4
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 23
M1 - 233406
ER -