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  Hindered magnetic order from mixed dimensionalities in CuP2O6

Nath, R., Ranjith, K. M., Sichelschmidt, J., Baenitz, M., Skourski, Y., Alet, F., et al. (2014). Hindered magnetic order from mixed dimensionalities in CuP2O6. Physical Review B, 89(1): 014407, pp. 1-11. doi:10.1103/PhysRevB.89.014407.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0017-FD0C-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-6ED6-4
Genre: Journal Article

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 Creators:
Nath, R.1, Author
Ranjith, K. M.1, Author
Sichelschmidt, J.2, Author              
Baenitz, M.3, Author              
Skourski, Y.1, Author
Alet, F.1, Author
Rousochatzakis, I.1, Author
Tsirlin, A. A.4, Author              
Affiliations:
1external, ou_persistent22              
2Jörg Sichelschmidt, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863468              
3Michael Baenitz, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863471              
4Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              

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 Abstract: We present a combined experimental and theoretical study of the spin-1/2 compound CuP2O6 that features a network of two-dimensional (2D) antiferromagnetic (AFM) square planes, interconnected via one-dimensional (1D) AFM spin chains. Magnetic susceptibility, high-field magnetization, and electron spin resonance (ESR) data, as well as microscopic density-functional band-structure calculations and subsequent quantum Monte Carlo simulations, show that the coupling J(2D) similar or equal to 40 K in the layers is an order of magnitude larger than J(1D) similar or equal to 3 K in the chains. Below T-N similar or equal to 8 K, CuP2O6 develops long-range order, as evidenced by a weak net moment on the 2D planes induced by anisotropic magnetic interactions of Dzyaloshinsky-Moriya type. A striking feature of this 3D ordering transition is that the 1D moments grow significantly slower than the ones on the 2D units, which is evidenced by the persistent paramagnetic ESR signal below T-N. Compared to typical quasi-2D magnets, the ordering temperature of CuP2O6 T-N/J(2D) similar or equal to 0.2 is unusually low, showing that weakly coupled spins sandwiched between 2D magnetic units effectively decouple these units and impede the long-range ordering.

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Language(s): eng - English
 Dates: 2014-01-08
 Publication Status: Published in print
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Title: Physical Review B
  Other : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 89 (1) Sequence Number: 014407 Start / End Page: 1 - 11 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008