Specific heat andμ+SRmeasurements inGd(hfac)3NITiPrmolecular magnetic chains: Indications for a chiral phase without long-range helical order
Specific heat andμ+SRmeasurements inGd(hfac)3NITiPrmolecular magnetic chains: Indications for a chiral phase without long-range helical order
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Gd(hfac)3NITi 分子磁链中的比热和 μ+SR 测量：无长程螺旋序的手性相的指示
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
A. Rettori
中科院分区：
文献类型：
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作者：
A. Lascialfari;R. Ullu;M. Affronte;F. Cinti;A. Caneschi;D. Gatteschi;D. Rovai;M. G. Pini;A. Rettori
在Gd（hfac）3NITiPr中进行了低温比热C（T）和零场μ子自旋共振（μ + SR）测量。比热数据在T0 =2.08 ′ 0.01K处有一个λ峰，该峰在5T磁场作用下消失。相反，μ + SR数据在T2 K没有出现任何异常，证明了通常三维长程螺旋序所要求的双自旋相关函数缺乏发散。此外，μ + SR非对称曲线不能显示μ子自旋进动，因此排除了长程有序磁晶格的存在。这些结果提供了一个低T相的手征秩序的情况下建立远程螺旋秩序的迹象。
Low-temperature specific heat C(T) and zero-field muon spin resonance (μ + SR) measurements were performed in Gd(hfac) 3 NITiPr, a quasi-one-dimensional molecular magnet with competing nearest-neighbor and next-nearest-neighbor intrachain exchange interactions. The specific heat data exhibit a λ peak at T 0 =2.08 ′0.01 K that disappears upon the application of a 5 T magnetic field. Conversely, the μ + SR data do not present any anomaly at T2 K, proving the lack of divergence of the two-spin correlation function as required for usual three-dimensional long-range helical order. Moreover, no muon spin precession can be evinced from the μ + SR asimmetry curves, thus excluding the presence of a long-range-ordered magnetic lattice. These results provide indications for a low-T phase where chiral order is established in absence of long-range helical order.