Zigzag magnetic order in a novel tellurate compound Na4−δNiTeO6 with S = 1 chains
Zigzag magnetic order in a novel tellurate compound Na4−δNiTeO6 with S = 1 chains
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DOI：
10.1007/s11433-022-1947-1
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发表时间：
2022-05
期刊：
影响因子：
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通讯作者：
Cheng Su;Xu-Tao Zeng;Yi Li;Nvsen Ma;Zheng-jiong Lin;Chuandi Zhang;Chin-wei Wang;Ziyu Chen;Xingye Lu;Wei Li;Xian-Lei Sheng;Wentao Jin
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文献类型：
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作者：
Cheng Su;Xu-Tao Zeng;Yi Li;Nvsen Ma;Zheng-jiong Lin;Chuandi Zhang;Chin-wei Wang;Ziyu Chen;Xingye Lu;Wei Li;Xian-Lei Sheng;Wentao Jin
Na4−δ niteo6是碲化物族过渡金属中少有的实现anS= 1自旋链结构的例子。通过中子粉末衍射测量，确定了Na4−δ niteo6的基态磁性结构。这些测量表明，在tn ~ 6.8(2) K以下，Ni2+矩形成沿晶体轴运行的螺旋铁磁（FM）自旋链结构，但这些FM自旋链沿着带方向反铁磁耦合，产生磁传播矢量K =(0,1 /2, 1/2)。这种之字形磁序得到第一性原理计算的很好支持。Ni2+的自旋矩大小为2.1(1)μBat 3 K，表明由于晶体电场（CEF）效应，轨道矩发生了明显的猝灭。先前报道的hc ~ 0.1 T附近的超磁跃迁可以理解为场诱导的自旋翻转跃迁。Na4−δ niteo6的磁性维度相对容易被外部参数调节，这使得Na4−δ niteo6成为进一步探索各种新型自旋链物理的有希望的候选者。
Na4−δNiTeO6is a rare example in the transition-metal tellurate family of realizing anS= 1 spin-chain structure. By performing neutron powder diffraction measurements, the ground-state magnetic structure of Na4−δNiTeO6is determined. These measurements reveal that belowTN∼ 6.8(2) K, the Ni2+moments form a screwed ferromagnetic (FM) spin-chain structure running along the crystallographicaaxis but these FM spin chains are coupled antiferromagnetically along thebandcdirections, giving rise to a magnetic propagation vector ofk= (0, 1/2, 1/2). This zigzag magnetic order is well supported by first-principles calculations. The moment size of Ni2+spins is determined to be 2.1(1)μBat 3 K, suggesting a significant quenching of the orbital moment due to the crystalline electric field (CEF) effect. The previously reported metamagnetic transition nearHC∼ 0.1 T can be understood as a field-induced spin-flip transition. The relatively easy tunability of the dimensionality of its magnetism by external parameters makes Na4−δNiTeO6a promising candidate for further exploring various types of novel spin-chain physics.