TY - JOUR
T1 - High-field ESR measurements of a bond alternating Heisenberg chain system Ni2(μ-N3)3(dpt)2(ClO4)
AU - Ohta, H.
AU - Okubo, S.
AU - Kimura, S.
AU - Takeda, S.
AU - Kikuchi, H.
AU - Nagasawa, H.
N1 - Funding Information:
This work was supported by a Research Fellowship of the Japan Society for the Promotion of Science for Young Scientists. This work was also partly supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture, Japan and by the Venture Business Laboratory of Kobe University.
PY - 2001/1
Y1 - 2001/1
N2 - High-field electron spin resonance has been measured on a Ni2(μ-N3)3(dpt)2(ClO4) single crystal, which is an S = 1 Heisenberg antiferromagnet with bond alternation, in the frequency region from 50 to 370 GHz using pulsed magnetic fields up to 16 T. The g-values for H perpendicular and parallel to the single-crystal plane were determined to be 2.19 and 2.13, respectively. By analyzing our results on frequency dependence at 20 K by the simple dimer model considering the singlet and triplet states, we were able to determine the single-ion anisotropy of the system as |D| = 10.6 K and |E| = 3.1 K for the first time. The spin gap was estimated to be 93 K from the analysis of the temperature dependence of the integrated intensity. These results will be discussed in connection with other S = 1 Heisenberg antiferromagnets with bond alternation.
AB - High-field electron spin resonance has been measured on a Ni2(μ-N3)3(dpt)2(ClO4) single crystal, which is an S = 1 Heisenberg antiferromagnet with bond alternation, in the frequency region from 50 to 370 GHz using pulsed magnetic fields up to 16 T. The g-values for H perpendicular and parallel to the single-crystal plane were determined to be 2.19 and 2.13, respectively. By analyzing our results on frequency dependence at 20 K by the simple dimer model considering the singlet and triplet states, we were able to determine the single-ion anisotropy of the system as |D| = 10.6 K and |E| = 3.1 K for the first time. The spin gap was estimated to be 93 K from the analysis of the temperature dependence of the integrated intensity. These results will be discussed in connection with other S = 1 Heisenberg antiferromagnets with bond alternation.
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U2 - 10.1016/S0921-4526(00)00607-4
DO - 10.1016/S0921-4526(00)00607-4
M3 - Article
AN - SCOPUS:0035063898
SN - 0921-4526
VL - 294-295
SP - 55
EP - 59
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
ER -