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Controlling magnetic order and quantum disorder in molecule-based magnets.

Lancaster, T. and Goddard, P. A. and Blundell, S. J. and Foronda, F. R. and Ghannadzadeh, S. and Möller, J. S. and Baker, P. J. and Pratt, F. L. and Baines, C. and Huang, L. and Wosnitza, J. and McDonald, R. D. and Modic, K. A. and Singleton, J. and Topping, C. V. and Beale, T. A. W. and Xiao, F. and Schlueter, J. A. and Barton, A. M. and Cabrera, R. D. and Carreiro, K. E. and Tran, H. E. and Manson, J. L. (2014) 'Controlling magnetic order and quantum disorder in molecule-based magnets.', Physical review letters., 112 (20). p. 207201.


We investigate the structural and magnetic properties of two molecule-based magnets synthesized from the same starting components. Their different structural motifs promote contrasting exchange pathways and consequently lead to markedly different magnetic ground states. Through examination of their structural and magnetic properties we show that [Cu(pyz)(H 2 O)(gly) 2 ](ClO 4 ) 2 may be considered a quasi-one-dimensional quantum Heisenberg antiferromagnet whereas the related compound [Cu(pyz)(gly)](ClO 4 ) , which is formed from dimers of antiferromagnetically interacting Cu 2+ spins, remains disordered down to at least 0.03 K in zero field but shows a field-temperature phase diagram reminiscent of that seen in materials showing a Bose-Einstein condensation of magnons.

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Publisher statement:Reprinted with permission from the American Physical Society: T. Lancaster, P. A. Goddard, S. J. Blundell, F. R. Foronda, S. Ghannadzadeh, J. S. Möller, P. J. Baker, F. L. Pratt, C. Baines, L. Huang, J. Wosnitza, R. D. McDonald, K. A. Modic, J. Singleton, C. V. Topping, T. A. W. Beale, F. Xiao, J. A. Schlueter, A. M. Barton, R. D. Cabrera, K. E. Carreiro, H. E. Tran, and J. L. Manson, Physical Review Letters, 112, 20, 207201, 2014. © 2014 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
Date accepted:18 April 2014
Date deposited:21 May 2014
Date of first online publication:19 May 2014
Date first made open access:No date available

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