@article{oai:kyutech.repo.nii.ac.jp:00005164, author = {Mito, Masaki and 美藤, 正樹 and Kawagoe, Seiichiro and Deguchi, Hiroyuki and 出口, 博之 and Takagi, Seishi and 高木, 精志 and Fujita, Wataru and Awaga, Kunio and Kondo, Ryusuke and Kagoshima, Seiichi}, issue = {12}, journal = {Journal of the Physical Society of Japan}, month = {Nov}, note = {We investigated the effects of hydrostatic pressure and uniaxial strain on the spin-Peierls (SP) transition of an organic radical magnet, benzo[1,2-d:4,5-d']bis[1,3,2]dithiazole(BBDTA)·InCl 4 . It has a one-dimensional coordination polymer structure along its c -axis and its SP transition occurs at 108 K. The SP transition temperature T SP decreased to 99 K at a hydrostatic pressure of 10 kbar, while it increased to 132 K at a uniaxial strain along the c -axis of 8 kbar. The pressure dependences of T SP under these two conditions were discussed by evaluating two parameters, namely, the intrachain interaction 2 J / k B and the effective spin–lattice coupling parameter η, that are related to T SP by the equation T SP =1.6η J / k B . Under ambient pressure, the a - and c -axes of this material shortened monotonically with decreasing temperature, while the b -axis elongated below T SP . In this study, we found the correlation between η and the change in the lattice constant b . 2 J / k B increased with increasing hydrostatic pressure and uniaxial strain, suggesting that the contraction along the c -axis does not depend on the manner of pressurization. From the evaluation of η, the observed variation in T SP is explained by the difference between the changes in b under the two pressurization conditions.}, pages = {124705--124705}, title = {Effects of Hydrostatic Pressure and Uniaxial Strain on Spin-Peierls Transition in an Organic Radical Magnet, BBDTA·InCl4}, volume = {78}, year = {2009}, yomi = {ミトウ, マサキ and デグチ, ヒロユキ and タカギ, セイシ} }