arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1105.5220cond-mat.str-el
收藏

高场下阻挫磁体的磁结构转变

Magneto-structural transitions in a frustrated magnet at high fields

V. Tsurkan, S. Zherlitsyn, V. Felea, S. Yasin, Yu. Skourski, J. Deisenhofer, H. -A. Krug von Nidda, P. Lemmens, J. Wosnitza, A. Loidl

摘要:

在静态磁场(18 T)和脉冲磁场(62 T)下对键阻ZnCr 2S 4尖晶石进行了超声和磁化研究。在温度低于反铁磁转变在T_N1 14 K的声速作为磁场的函数揭示了一系列的步骤,其次是高原表明一系列的晶体结构与恒定的刚度。与此同时,磁化强度随着磁场的变化而不断变化,直到完全极化,而没有任何平台,这与几何受挫的氧化铬尖晶石相反。所观察到的高场磁结构状态的H-T相图内进行了讨论,考虑到三个共存的自旋结构和随后的晶格转变引起的磁场的字段和温度的演变。

英文摘要:

Ultrasound and magnetization studies of bond-frustrated ZnCr2S4 spinel are performed in static magnetic fields up to 18 T and in pulsed fields up to 62 T. At temperatures below the antiferromagnetic transition at T_N1 14 K the sound velocity as function of magnetic field reveals a sequence of steps followed by plateaus indicating a succession of crystallographic structures with constant stiffness. At the same time, the magnetization evolves continuously with field up to full magnetic polarization without any plateaus in contrast to geometrically frustrated chromium oxide spinels. The observed high-field magneto-structural states are discussed within a H-T phase diagram taking into account the field and temperature evolution of three coexisting spin structures and subsequent lattice transformations induced by magnetic field.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑