Publications 1999-2009

(46) The synthesis and structural characterization of La_1-xA_xMnO_2.5 (A = Ba, Sr, Ca) phases – mapping the variants of the brownmillerite structure
T. G. Parsons, H. D'Hondt, J. Hadermann and M. A. Hayward
Chemistry of Materials, 21 (2009) 5527. Download

(45) The Influence of Topotactic Reduction on the Structure and Magnetism of the Multiferroic YMnO₃
A. J. Overton, J. L. Best, I. Saratovsky and M. A. Hayward
Chemistry of Materials, 21 (2009) 4940. Download

(44) Topotactic reduction as a route to new close-packed anion deficient perovskites: The structure and magnetism of 4H-BaMnO_2+x
J. Hadermann, A. Abakumov, J. J. Adkin and M. A. Hayward
Journal of the American Chemical Society, 131 (2009) 10598. Download

(43) The structure of manganese oxide formed by the fungus acremonium sp strain KR21-2
I. Saratovsky, S. J. Gurr and M. A. Hayward
Geochimica et Cosmochimica Acta, 73 (2009) 3291. Download

(42) SQUID magnetometry as a tool for following a clock reaction in solution
R. Evans, K. B. Henbest, M. A. Hayward, M. M. Britton, K. Maeda and C. R. Timmel
Dalton Transactions, (2009) 2467. Download

(41) Atomic-scale structure of biogenic materials by total X-ray diffraction: a study of bacterial and fungal MnO_x
V. Petkov, Y. Ren, I. Saratovsky, P. Pasten, S. J. Gurr, M. A. Hayward, K. R. Poeppelmeier and J.-F. Gaillard
ACS Nano, 3 (2009) 441. Download

(40) Room temperature antiferromagnetic order in the Mn(II) oxide 4H-Ba_0.5Sr_0.5MnO_2+d.
J. J. Adkin and M. A. Hayward
Inorganic Chemistry, 47 (2008) 10959. Download

(39) Structure, magnetism, and substitutional chemistry of cation-ordered (Ba/Sr)_5+nMn_3+nCr₂O_3n+14 phases.
J. H. Clark and M. A. Hayward
Chemistry of Materials, 20 (2008) 4612. Download

(38) Preparation of Sr₇Mn₄O₁₃F₂ by the topotactic reduction and subsequent fluorination of Sr₇Mn₄O₁₅.
I Saratovsky, M. A. Lockett, N.H. Rees and M.A. Hayward
Inorganic Chemistry, 47 (2008) 5212. Download

(37) Materials chemistry - Cool conditions for mobile ions.
M. A. Hayward and M. J. Rosseinsky
Nature, 450 (2007) 960. Download

(36) Anion vacancy ordering in Sr₇Mn₄O_15-x phases.
M. O’Malley, M.A. Lockett and M.A. Hayward
Journal of Solid State Chemistry, 180 (2007) 2851. Download

(35) Ba₇Mn₅Cr₂O₂₀: Charge and chemical order.
S. J. Dunstone, J. H. Clark and M. A. Hayward.
Chemical Communications, (2007) 1905. Download

(34) BaMnO_3-x revisited: A structural and magnetic study.
J. J. Adkin and M.A. Hayward
Chemistry of Materials, 19 (2007) 755. Download

(33) Dielectric anomalies and spiral magnetic order in CoCr₂O₄.
G. Lawes, B. Melot, K. Page, C. Ederer, M. A. Hayward, Th. Proffen and R. Seshadri.
Physical Review B, 74 (2006) 24413. Download

(32) Displacive disorder in three high-k bismuth oxide pyrochlores.
B. Melot, E. Rodriguez, Th. Proffen, M. A. Hayward and R. Seshadri
Materials Research Bulletin, 41 (2006) 961. Download

(31) Charge and structural ordering in the brownmillerite phases: La_1-xSr_xMnO_2.5 (0.2 < x <0.4).
P.S. Casey, D. Barker and M.A. Hayward
Journal of Solid State Chemistry, 179 (2006) 1375. Download

(30) Structural and magnetic properties of topotactically reduced YSr₂Mn₂O_7-x (0 < x < 1.5).
M.A. Hayward
Chemistry of Materials, 18 (2006) 321. Download

(29) Structure and magnetism of 4H-BaMnO_3-x (0 <= x <= 0.35) and 4H-Ba_0.5Sr_0.5MnO_3-x (0 <= x <= 0.21).
J.J. Adkin and M.A. Hayward
Journal of Solid State Chemistry, 179 (2006) 70. Download

(28) Electronic structure, magnetic ordering, and formation pathway of the transition metal oxide hydride LaSrCoO₃H_0.7.
C.A. Bridges, G.R. Darling, M.A. Hayward and M.J. Rosseinsky
Journal of the American Chemical Society, 127 (2005) 5996. Download

(27) Phase separation during the topotactic reduction of the Pyrochlore Y₂Ti₂O₇.
M. A. Hayward
Chemistry of Materials, 17 (2005) 670. Download

(26) Pressure dependence of the superconducting transition temperature of MgCNi₃.
G. Garbarino, M. Monteverde, M. Núñez-Regueiro, C. Acha, R. Weht, T. He, K. A. Regan, N. Rogado, M. A. Hayward and R. J. Cava
Physica C, 408-410 (2004) 754. Download

(25) Electronically driven structural distortions in lithium intercalates of the n=2 Ruddlesden-popper-type host Y₂Ti₂O₅S₂: Synthesis, structure, and properties of Li_xY₂Ti₂O₅S₂ (0 < x < 2).
G. Hyett, O. J. Rutt, Z. A. Gal, S. G. Denis, M. A. Hayward and S. J. Clarke
Journal of the American Chemical Society, 126 (2004) 1980. Download

(24) MgB₂ energy gap determination by scanning tunneling spectroscopy.
T. W. Heitmann, S. D. Bu, D. M. Kim, J. H. Choi, J. Giencke, C. B. Eom, K. A. Regan, N. Rogado, M. A. Hayward, T. He, J. S. Slusky, P. Khalifah, M. Haas, R. J. Cava,
D. C. Larbalestier and M. S. Rzchowski
Superconductor Science and Technology, 17 (2004) 237.

(23) Selective deintercalation of apex over face-shared oxide ions in the topotactic reduction of Sr₇Mn₄O₁₅ to Sr₇Mn₄O₁₂.
M. A. Hayward
Chemical Communications, 2 (2004) 170. Download

(22) Sodium intercalation into the n=2 Ruddlesden-Popper type host Y₂Ti₂O₅S₂: Synthesis, structure, and properties of α-Na_xY₂Ti₂O₅S₂ (0 < x <= 1).
S. J. Clarke, S. G. Denis, O. J. Rutt, T. L. Hill, M. A. Hayward, G. Hyett and Z. A. Gal
Chemistry of Materials, 15 (2003) 5065.

(21) The cation-deficient Ruddlesden-Popper oxysulfide Y₂Ti₂O₅S₂ as a layered sulfide: Topotactic potassium intercalation to form KY₂Ti₂O₅S₂.
O.J. Rutt, T. L. Hill, Z. A. Gall, M. A. Hayward and S. J. Clarke
Inorganic Chemistry, 42 (2003) 7906.

(20) Synthesis of the infinite layer Ni(I) phase NdNiO_2+x by the low temperature reduction of NdNiO₃ with sodium hydride.
M. A. Hayward and M. J. Rosseinsky
Solid State Sciences, 5 (2003) 839.

(19) Magnetism in oxide chains bridged with the hydride anion: LaSrCoO₃H_0.7 studied using muon-spin rotation.
S.J. Blundell, I.M. Marshall, F.L. Pratt, M.A. Hayward, E.J. Cussen, J.B. Claridge, M. Bieringer, C.J. Kiely and M.J. Rosseinsky
Physica B: Condensed Matter, 326 (2003) 527.

(18) Structure, Stoichiometry and Properties of the Chimney-ladder Phases Ru₂Ge_3+x (0<x<1).
M. A. Hayward, A. P. Ramirez and R. J. Cava
Journal of Solid State Chemistry, 166 (2002) 389.

(17) The effect of Elemental Substitution on the Electronic Properties of Ru₂Ge₃.
M.A. Hayward and R.J. Cava
Journal of Physics: Condensed Matter, 14 (2002) 6543.

(16) The hydride anion in an extended transition metal oxide array – LaSrCoO₃H_0.7.
M. A Hayward, E.J. Cussen, J. B. Claridge, M. Bieringer, M. J. Rosseinsky, C. J. Kiely, S. J. Blundell, I. M. Marshall and F. L. Pratt
Science, 295 (2002) 1882.

(15) The complex superstructure in Mg_1-xAl_xB₂ at x approximate to 0.5.
H.W. Zandbergen, M.Y. Wu, H. Jiang, M.A. Hayward, M.K. Haas, R.J. Cava
Physica C, 366 (2002) 221.

(14) Low temperature synthesis of MgB₂.
N. Rogado, M.A. Hayward, K.A. Regan, Y.Y. Wang, N.P. Ong, H.W. Zandbergen, J.M. Rowell, R.J. Cava
Journal of Applied Physics, 91 (2002) 274.

(13) Temperature dependence of the structural parameters of the non-oxide perovskite superconductor MgCNi₃.
Q. Huang , T. He, K.A. Regan, N. Rogado, M.A. Hayward, M.K. Haas, K. Inumaru, R.J. Cava
Physica C, 363 (2001) 215.

(12) ¹³C NMR investigation of the superconductor MgCNi₃ up to 800K.
P.M. Singer, T. Imai, T. He, M.A. Hayward and R. J. Cava
Physical Review Letters, 87 (2001) 257601.

(11) Absence of a structural transition up to 40 GPa in MgB₂ and the relevance of magnesium nonstoichiometry.
P. Bordet, M. Mezouar, M. Núñez-Regueiro, M. Monteverde, M. D. Núñez-Regueiro, N. Rogado, K. A. Regan, M. A. Hayward, T. He, S. M. Loureiro, and R. J. Cava
Physical Review B, 64 (2001) 172502.

(10) The suppression of superconductivity in MgCNi₃ by Ni-site doping.
M.A. Hayward, M.K. Haas, A.P. Ramirez, T. He, K.A. Regan, N. Rogado, K. Inumaru and R.J. Cava
Solid State Communications, 119 (2001) 491.

(9) Giant anharmonicity and nonlinear electron-phonon coupling in MgB₂: A combined first-principles calculation and neutron scattering study.
T. Yildirim, O. Gulseren, J.W. Lynn, C.M. Brown, T.J. Udovic, Q. Huang, N. Rogado, K.A. Regan, M.A. Hayward, J.S. Slusky, T. He, M.K. Haas, P. Khalifah, K. Inumaru and R.J. Cava
Physical Review Letters, 87 (2001) 037001.

(8) High critical current density and enhanced irreversibility field in superconducting MgB₂ thin films.
C.B. Eom, M.K. Lee, J.H. Choi, L.J. Belenky, X. Song, L.D. Cooley, M.T. Naus, S. Patnaik, J. Jiang, M. Rikel, A. Polyanskii, A. Gurevich, X.Y. Cai, S.D. Bu, S.E. Babcock, E.E. Hellstrom, D.C. Larbalestier, N. Rogado, K.A. Regan, M.A. Hayward, T. He, J.S. Slusky, K. Inumaru, M.K. Haas and R.J. Cava
Nature, 411 (2001) 558.

(7) Superconductivity in the non-oxide perovskite MgCNi₃.
T. He, Q. Huang, A.P. Ramirez, Y. Wang, K.A. Regan, N. Rogado, M.A. Hayward, M.K. Haas, J.S. Slusky, K. Inumara, H.W. Zandbergen, N.P. Ong and R.J. Cava
Nature, 411 (2001) 54.

(6) Pressure dependence of the superconducting transition temperature of magnesium diboride.
M. Monteverde, M. Nunez-Regueiro, N. Rogado, K.A. Regan, M.A. Hayward, T. He, S.M. Loureiro and R.J. Cava
Science, 292 (2001) 75.

(5) Loss of superconductivity and structural transition in Mg_1-xAl_xB₂.
J.S. Slusky, N. Rogado, K.A. Regan, M.A. Hayward, P. Khalifah, T. He, K. Inumaru, S. Loureiro, M.K. Haas, H. W. Zandbergen, and R.J. Cava
Nature, 410 (2001) 343.

(4) Strongly linked current flow in polycrystalline forms of the new superconductor MgB₂.
D.C. Larbalestier, M.O. Rikel, L.D. Cooley, A.A. Polyanskii, J.Y. Jiang, S. Patnaik, X.Y. Cai, D.M. Feldmann, A. Gurevich, A.A. Squitieri, M.T. Naus, C.B. Eom, E.E. Hellstrom, R.J. Cava, K.A. Regan, N. Rogado, M.A. Hayward, T. He, J.S. Slusky, P. Khalifah, K. Inumaru and M. Haas
Nature, 410 (2001) 186.

(3) Anion vacancy distribution and magnetism in the new reduced layered Co(II)/Co(I) phase LaSrCoO_3.5-x.
M.A. Hayward and M.J. Rosseinsky
Chemistry of Materials, 12 (2000) 2182.

(2) Strong ferromagnetic coupling in the K₂NiF₄-structured oxide La_0.8Sr_1.2Mn_0.6Rh_0.4O₄.
P.D. Battle, J.C. Burley, E.J. Cussen, G. C. Hardy, M. A. Hayward, L.D. Noailles and M.J. Rosseinsky
Chemical Communications, 19 (1999) 1977.

(1) Sodium hydride as a powerful reducing agent for topotactic oxide deintercalation: synthesis and characterisation of the nickel (I) oxide LaNiO₂.
M.A. Hayward, M.A. Green, M. J. Rosseinsky and J. Sloan
Journal of the American Chemical Society, 121 (1999) 8843.