*. Dr, A. Sylvain-bertaina, C. Université, and I. Umr7334, Phone : Fax : )

A. K. Cheetham and C. N. Rao, There's Room in the Middle, Science, vol.45, issue.31, pp.318-58, 2007.
DOI : 10.1002/anie.200600553

M. Fiebig, Revival of the magnetoelectric effect, Journal of Physics D: Applied Physics, vol.38, issue.8, pp.123-152, 2005.
DOI : 10.1088/0022-3727/38/8/R01

G. Catalan, J. Seidel, R. Ramesh, and J. F. Scott, Domain wall nanoelectronics, Reviews of Modern Physics, vol.35, issue.1, pp.119-156, 2012.
DOI : 10.1038/460045a

L. Murray, M. Dinca, and J. R. Long, Hydrogen storage in metal???organic frameworks, Chemical Society Reviews, vol.112, issue.447, pp.1294-1314, 2009.
DOI : 10.1039/b802256a

P. Jain, N. S. Dalal, B. H. Toby, H. W. Kroto, and A. K. Cheetham, Order???Disorder Antiferroelectric Phase Transition in a Hybrid Inorganic???Organic Framework with the Perovskite Architecture, Journal of the American Chemical Society, vol.130, issue.32, pp.10450-10451, 2008.
DOI : 10.1021/ja801952e

T. Besara, P. Jain, N. S. Dalal, P. L. Kuhns, A. P. Reyes et al., Mechanism of the Order-Disorder Transition, and Glassy Behavior in the Metal-Organic Framework, CH3)2NH2]Zn(HOO)3 Proc. Nat. Acad. Sci, pp.6828-6832, 2011.

A. K. Cheetham, Multiferroic Behavior Associated with an Order-Disorder Hydrogen- Bonding Transition in Metal-Organic Frameworks ( MOFs) with the Perovskite ABX3 Architecture, J. Am. Chem. Soc, vol.131, pp.13625-13627, 2009.

K. Hu, M. Kurmoo, Z. Wang, and S. Gao, = Guanidinium), NH2) 3][MII (HCOO) 3](M= Mn Zn; C (NH2) 3= Guanidinium), pp.12050-12064, 2009.
DOI : 10.1109/9780470546581

G. Xu, X. Ma, L. Zhang, Z. Wang, and S. Gao, ], Journal of the American Chemical Society, vol.132, issue.28, pp.132-9588, 2010.
DOI : 10.1021/ja104263m

M. Maczka, A. Ciupa, A. Gagor, A. Sieradzki, A. Pikul et al., ]: Phase Transition, Magnetic, Dielectric, and Phonon Properties, Inorganic Chemistry, vol.53, issue.10, pp.53-5260, 2014.
DOI : 10.1021/ic500479e

M. Maczka, . Pietraszko, L. Macalik, A. Sieradzki, J. Trzmiel et al., ], CH3)2NH2]Na0. 5Fe0.5(HCOO)3], pp.17075-17084, 2014.
DOI : 10.1002/chem.200901605

Z. Du, Y. Zhao, C. He, B. Wang, W. Xue et al., Structural Transition in the Perovskite-like Bimetallic Azido Coordination Polymers, NMe4)2[B? ·B? (N3)6] (B? = Cr3+, Fe3+; B? = Na+, K+), pp.14-3903, 2014.

M. Sánchez-andújar, S. Presedo, S. Yáñez-vilar, S. Castro-garcía, J. Shamir et al., ], CH3)2NH2], pp.3-1510, 2010.
DOI : 10.1021/ic901872g

M. M?czka, A. G?gor, B. Macalik, A. Pikul, M. Ptak et al., ] (M = Ni, Mn), CH3)2NH2][M(HCOO)3] and [(CH3)2ND2][M(HCOO)3] (M = Ni, Mn), pp.457-467, 2014.
DOI : 10.1021/ic402425n

D. I. Khomskii, Multiferroics: Different ways to combine magnetism and ferroelectricity, Journal of Magnetism and Magnetic Materials, vol.306, issue.1, pp.1-8, 2005.
DOI : 10.1016/j.jmmm.2006.01.238

URL : http://arxiv.org/pdf/cond-mat/0601696

X. Han and Y. Sun, Magnetoelectric Coupling in the Paramagnetic State of a Metal- Organic Framework, Scientific Reports, vol.3, pp.2024-2029, 2013.

N. S. Dalal, EPR and ENDOR Studies of Slow Dynamics and the Central Peak Phenomenon near Phase Transitions, Advan Mag. Reson, vol.10, pp.119-218, 1982.
DOI : 10.1016/B978-0-12-025510-8.50008-5

J. Y. Buzaré, J. J. Rousseau, and J. C. Fayet, La paire Gd3+-O2- dans RbCaF3 : une sonde sensible pour l'??tude par R.P.E. de la transition structurale a 193 K, Journal de Physique Lettres, vol.24, issue.21, pp.445-448, 1977.
DOI : 10.1051/jphyslet:019770038017035900

B. Cage, P. Cevc, R. Blinc, L. Brunel, and N. S. Dalal, 1???370 GHz EPR Linewidths for K3CrO8: A Comprehensive Test for the Anderson???Weiss Model, Journal of Magnetic Resonance, vol.135, issue.1, pp.178-184, 1998.
DOI : 10.1006/jmre.1998.1569

J. Van-tol, L. Brunel, and R. J. Wylde, A quasioptical transient electron spin resonance spectrometer operating at 120 and 240 GHz, Review of Scientific Instruments, vol.76, issue.7, p.74101, 2005.
DOI : 10.1557/JMR.2001.0425

R. I. Thomson, P. Jain, A. K. Cheetham, and M. A. Carpenter, Elastic relaxation behavior, magnetoelastic coupling, and order-disorder processes in multiferroic metal-organic frameworks, Physical Review B, vol.88, issue.21, p.214304, 2012.
DOI : 10.1021/ja204548d

URL : http://eprints.esc.cam.ac.uk/2670/1/Thomson_et_al._-_2012_-_Elastic_relaxation_behavior%2C_magnetoelastic_coupli.pdf

P. W. Anderson, Exchange Narrowing in Paramagnetic Resonance, Reviews of Modern Physics, vol.74, issue.1, 1953.
DOI : 10.1021/ja01134a017

X. Wang, L. Gan, S. Zhang, and S. Gao, Perovskite-like Metal Formates with Weak Ferromagnetism and as Precursors to Amorphous Materials, Inorganic Chemistry, vol.43, issue.15, pp.4615-4625, 2004.
DOI : 10.1021/ic0498081

M. Razeghi, B. Houlier, and M. Yuste, EPR study of Mn2+ around the ferroelastic transition point of Pb3(PO4)2, Solid State Communications, vol.26, issue.10, pp.665-668, 1978.
DOI : 10.1016/0038-1098(78)90103-5