TY - JOUR
T1 - Electron spin resonance observation of dehydration-induced spin excitations in quasi-one-dimensional iodo-bridged diplatinum complexes
AU - Tanaka, Hisaaki
AU - Kuroda, Shin Ichi
AU - Iguchi, Hiroaki
AU - Takaishi, Shinya
AU - Yamashita, Masahiro
PY - 2012/2/21
Y1 - 2012/2/21
N2 - Electron spin resonance (ESR) measurements have been performed on a series of quasi-one-dimensional iodo-bridged diplatinum complexes K 2[C 3H 5R(NH 3) 2][Pt 2(pop) 4I]•4H 2O (pop = P 2H 2O 52 -; R = H, CH 3, or Cl), where dehydration/rehydration of the crystalline water switches the electronic state reversibly with retention of single crystallinity. We have observed a nonmagnetic nature in as-grown samples, whereas in the dehydrated samples, a clear enhancement of the spin susceptibility has been observed above ∼80 K with the activation energy ranging 50-60 meV. The activated spins originate from isolated Pt3 + state on the chain, as confirmed from the principal g values. Concomitantly, the ESR linewidth exhibits a prominent motional narrowing, suggesting that the activated Pt3 + spins are mobile solitons generated in the doubly degenerate charge-density-wave states of the dehydrated salts.
AB - Electron spin resonance (ESR) measurements have been performed on a series of quasi-one-dimensional iodo-bridged diplatinum complexes K 2[C 3H 5R(NH 3) 2][Pt 2(pop) 4I]•4H 2O (pop = P 2H 2O 52 -; R = H, CH 3, or Cl), where dehydration/rehydration of the crystalline water switches the electronic state reversibly with retention of single crystallinity. We have observed a nonmagnetic nature in as-grown samples, whereas in the dehydrated samples, a clear enhancement of the spin susceptibility has been observed above ∼80 K with the activation energy ranging 50-60 meV. The activated spins originate from isolated Pt3 + state on the chain, as confirmed from the principal g values. Concomitantly, the ESR linewidth exhibits a prominent motional narrowing, suggesting that the activated Pt3 + spins are mobile solitons generated in the doubly degenerate charge-density-wave states of the dehydrated salts.
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U2 - 10.1103/PhysRevB.85.073104
DO - 10.1103/PhysRevB.85.073104
M3 - Article
AN - SCOPUS:84857728174
SN - 1098-0121
VL - 85
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 7
M1 - 073104
ER -