TY - JOUR
T1 - Suppression of macroscopic quantum coherence in magnetic particles by nuclear spins
AU - Garg, Anupam
PY - 1995
Y1 - 1995
N2 - The Néel vector of a small antiferromagnetic particle can in principle resonate between opposite directions. Nuclear spins strongly suppress this and related macroscopic quantum coherence (MQC), even when magnetic nuclei have only 2% abundance. The resonance signal breaks up into well separated groups of lines, and the highest frequency signal height increases with temperature as exp(-T02/T2). For a recent claim to have seen MQC in ferritin, less than 3.5% of the particles are found capable of contributing to the signal.
AB - The Néel vector of a small antiferromagnetic particle can in principle resonate between opposite directions. Nuclear spins strongly suppress this and related macroscopic quantum coherence (MQC), even when magnetic nuclei have only 2% abundance. The resonance signal breaks up into well separated groups of lines, and the highest frequency signal height increases with temperature as exp(-T02/T2). For a recent claim to have seen MQC in ferritin, less than 3.5% of the particles are found capable of contributing to the signal.
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U2 - 10.1103/PhysRevLett.74.1458
DO - 10.1103/PhysRevLett.74.1458
M3 - Article
C2 - 10059025
AN - SCOPUS:4243539154
SN - 0031-9007
VL - 74
SP - 1458
EP - 1461
JO - Physical review letters
JF - Physical review letters
IS - 8
ER -