TY - JOUR
T1 - Magnetic order and charge separation in 2D distorted triangular lattice systems β′X[Pd(dmit)2]2
AU - Ohira, S.
AU - Tamura, M.
AU - Kato, R.
AU - Iwasaki, M.
N1 - Funding Information:
This work is supported by Joint Programs and Grant-in-Aid for JSPS and partly by a Grant-in-Aid for Scientific Research (No. 15550135) from the Ministry of Education, Culture, Sports, Science and Technology, Japan.
PY - 2006/3/31
Y1 - 2006/3/31
N2 - Magnetic properties of organic compounds with two-dimensional distorted triangular lattice structure, β′-X[Pd(dmit)2]2 are investigated by the muon spin relaxation (μSR) method, where X is counter cation. We have previously reported that the X=Me4P salt (1, Me=CH3) shows a very sharp antiferromagnetic (AFM) transition at 39.3 K. We have carried out μSR measurements on other two Pd(dmit)2 salts: the X=Et2Me2P salt (2, Et=C2H5) and the Et2Me2Sb salt (3). In compound 2, an AFM transition at lower TN=15K with a smaller enhancement of the muon spin relaxation is observed, indicating a larger effect of the spin frustration than in 1. The zero-field μSR time spectra of 3 showed an enhancement of the relaxation below ∼80K, but did not show precessions. Recently, it has been suggested that this salt undergoes a phase transition to a charge-separated nonmagentic state. It is expected that the enhancement of the relaxation is related to the spin localization attributable to the charge separation.
AB - Magnetic properties of organic compounds with two-dimensional distorted triangular lattice structure, β′-X[Pd(dmit)2]2 are investigated by the muon spin relaxation (μSR) method, where X is counter cation. We have previously reported that the X=Me4P salt (1, Me=CH3) shows a very sharp antiferromagnetic (AFM) transition at 39.3 K. We have carried out μSR measurements on other two Pd(dmit)2 salts: the X=Et2Me2P salt (2, Et=C2H5) and the Et2Me2Sb salt (3). In compound 2, an AFM transition at lower TN=15K with a smaller enhancement of the muon spin relaxation is observed, indicating a larger effect of the spin frustration than in 1. The zero-field μSR time spectra of 3 showed an enhancement of the relaxation below ∼80K, but did not show precessions. Recently, it has been suggested that this salt undergoes a phase transition to a charge-separated nonmagentic state. It is expected that the enhancement of the relaxation is related to the spin localization attributable to the charge separation.
KW - Charge separation
KW - Distorted triangular lattice
KW - Magnetic ordering
KW - Pd(dmit)]
UR - http://www.scopus.com/inward/record.url?scp=33644684261&partnerID=8YFLogxK
U2 - 10.1016/j.physb.2005.11.031
DO - 10.1016/j.physb.2005.11.031
M3 - Conference article
AN - SCOPUS:33644684261
SN - 0921-4526
VL - 374-375
SP - 122
EP - 125
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
T2 - Proceedings of the Tenth International Conference on Muon Spin Rotation, Relaxation and Resonance
Y2 - 8 August 2005 through 12 August 2005
ER -