Outputs (115)

Effect of disorder on a pressure-induced z = 1 magnetic quantum phase transition (2016)
Journal Article
Mannig, A., Möller, J., Thede, M., Hüvonen, D., Lancaster, T., Xiao, F., …Zheludev, A. (2016). Effect of disorder on a pressure-induced z = 1 magnetic quantum phase transition. Physical Review B, 94(14), Article 144418. https://doi.org/10.1103/physrevb.94.144418

Pressure-induced ordering close to a z=1 quantum-critical point is studied in the presence of bond disorder in the quantum spin system (C4H12N2)Cu2(Cl1−xBrx)6 (PHCX) by means of muon-spin rotation and relaxation. As for the pure system (C4H12N2)Cu2Cl... Read More about Effect of disorder on a pressure-induced z = 1 magnetic quantum phase transition.

Bimetallic MOFs (H3O)x[Cu(MF6)(pyrazine)2]·(4 − x)H2O (M = V4+, x = 0; M = Ga3+, x = 1): co-existence of ordered and disordered quantum spins in the V4+ system (2016)
Journal Article
Manson, J. L., Schlueter, J. A., Garrett, K. E., Goddard, P. A., Lancaster, T., Möller, J. S., …Baines, C. (2016). Bimetallic MOFs (H3O)x[Cu(MF6)(pyrazine)2]·(4 − x)H2O (M = V4+, x = 0; M = Ga3+, x = 1): co-existence of ordered and disordered quantum spins in the V4+ system. Chemical Communications, 52(85), 12653-12656. https://doi.org/10.1039/c6cc05873f

The title compounds are bimetallic MOFs containing [Cu(pyz)2]2+ square lattices linked by MF6n− octahedra. In each, only the Cu2+ spins exhibit long-range magnetic order below 3.5 K (M = V4+) and 2.6 K (M = Ga3+). The V4+ spins remain disordered down... Read More about Bimetallic MOFs (H3O)x[Cu(MF6)(pyrazine)2]·(4 − x)H2O (M = V4+, x = 0; M = Ga3+, x = 1): co-existence of ordered and disordered quantum spins in the V4+ system.

La2SrCr2O7: Controlling the Tilting Distortions of n=2 Ruddlesden-Popper Phases through A-Site Cation Order (2016)
Journal Article
Zhang, R., Abbett, B., Read, G., Lang, F., Lancaster, T., Tran, T., …Hayward, M. (2016). La2SrCr2O7: Controlling the Tilting Distortions of n=2 Ruddlesden-Popper Phases through A-Site Cation Order. Inorganic Chemistry, 55(17), 8951-8960. https://doi.org/10.1021/acs.inorgchem.6b01445

The n = 2 Ruddlesden−Popper phase La2SrCr2O7 adopts a highly unusual structural configuration in which the cooperative rotations of the CrO6 octahedra are out of phase in all three Cartesian directions (ΦΦΦz/ΦΦΦz; a−a−c−/a−a−c−). First-principles DFT... Read More about La2SrCr2O7: Controlling the Tilting Distortions of n=2 Ruddlesden-Popper Phases through A-Site Cation Order.

Nanoscale depth-resolved polymer dynamics probed by the implantation of low energy muons (2016)
Journal Article
Pratt, F. L., Lancaster, T., Baker, P. J., Blundell, S. J., Prokscha, T., Morenzoni, E., …Assender, H. E. (2016). Nanoscale depth-resolved polymer dynamics probed by the implantation of low energy muons. Polymer, 105, 516-525. https://doi.org/10.1016/j.polymer.2016.07.078

The low energy muon (LEM) technique has been used to probe local changes in the dynamical spectrum of thin film polymer samples taking place as a function of the temperature and the implantation depth below the free surface. The studies have been mad... Read More about Nanoscale depth-resolved polymer dynamics probed by the implantation of low energy muons.

Magnetization dynamics and frustration in the multiferroic double perovskite Lu2MnCoO6 (2016)
Journal Article
Zapf, V., Ueland, B., Laver, M., Lonsky, M., Pohlit, M., Muller, J., …Senarıs-Rodrıguez, M. (2016). Magnetization dynamics and frustration in the multiferroic double perovskite Lu2MnCoO6. Physical Review B, 93(13), Article 134431. https://doi.org/10.1103/physrevb.93.134431

We investigate the magnetic ordering and the magnetization dynamics (from kHz to THz time scales) of the double perovskite Lu2MnCoO6 using elastic neutron diffraction, muon spin relaxation, and micro-Hall magnetization measurements. This compound is... Read More about Magnetization dynamics and frustration in the multiferroic double perovskite Lu2MnCoO6.

Transverse field muon-spin rotation measurement of the topological anomaly in a thin film of MnSi (2016)
Journal Article
Lancaster, T., Xiao, F., Salman, Z., Thomas, I., Blundell, S., Pratt, F., …Hesjedal, T. (2016). Transverse field muon-spin rotation measurement of the topological anomaly in a thin film of MnSi. Physical Review B, 93(14), Article 140412(R). https://doi.org/10.1103/physrevb.93.140412

We present the results of transverse-field muon-spin rotation measurements on an epitaxially grown 40-nm-thick film of MnSi on Si(111) in the region of the field-temperature phase diagram where a skyrmion phase has been observed in the bulk. We ident... Read More about Transverse field muon-spin rotation measurement of the topological anomaly in a thin film of MnSi.

Magnetic phase diagram of La2-xSrxCoO 4 revised using muon-spin relaxation (2016)
Journal Article
Williams, R., Xiao, F., Lancaster, T., De Renzi, R., Allodi, G., Bordignon, S., …Prabhakaran, D. (2016). Magnetic phase diagram of La2-xSrxCoO 4 revised using muon-spin relaxation. Physical Review B, 93(14), Article 140406(R). https://doi.org/10.1103/physrevb.93.140406

We report the results of a muon-spin relaxation (μSR) investigation of La2−xSrxCoO4, an antiferromagnetic insulating series which has been shown to support charge ordered and magnetic stripe phases and an hourglass magnetic excitation spectrum. We pr... Read More about Magnetic phase diagram of La2-xSrxCoO 4 revised using muon-spin relaxation.

La2SrCr2O7F2: A Ruddlesden–Popper Oxyfluoride Containing Octahedrally Coordinated Cr4+ Centers (2016)
Journal Article
Zhang, R., Read, G., Lang, F., Lancaster, T., Blundell, S., & Hayward, M. (2016). La2SrCr2O7F2: A Ruddlesden–Popper Oxyfluoride Containing Octahedrally Coordinated Cr4+ Centers. Inorganic Chemistry, 55(6), 3169-3174. https://doi.org/10.1021/acs.inorgchem.6b00114

The low-temperature fluorination of the n = 2 Ruddlesden–Popper phase La2SrCr2O7 yields La2SrCr2O7F2 via a topochemical fluorine insertion reaction. The structure-conserving nature of the fluorination reaction means that the chromium centers of the i... Read More about La2SrCr2O7F2: A Ruddlesden–Popper Oxyfluoride Containing Octahedrally Coordinated Cr4+ Centers.

Antiferromagnetism in a Family of S = 1 Square Lattice Coordination Polymers NiX2(pyz)2 (X = Cl, Br, I, NCS; pyz = Pyrazine) (2016)
Journal Article
Liu, J., Goddard, P., Singleton, J., Brambleby, J., Foronda, F., Moeller, J., …Manson, J. (2016). Antiferromagnetism in a Family of S = 1 Square Lattice Coordination Polymers NiX2(pyz)2 (X = Cl, Br, I, NCS; pyz = Pyrazine). Inorganic Chemistry, 55(7), 3515-3529. https://doi.org/10.1021/acs.inorgchem.5b02991

NiX2(pyz)2 have been synthesized and characterized using several magnetic probes. Except for X = Cl, long-range AFM order was found below TN = 1.9 (X = Br and NCS) and 2.5 K (X = I). In addition, Jpyz ∼ 1 K regardless of X, and D = 8 K for NiCl2(pyz)... Read More about Antiferromagnetism in a Family of S = 1 Square Lattice Coordination Polymers NiX2(pyz)2 (X = Cl, Br, I, NCS; pyz = Pyrazine).

Control of the third dimension in copper-based square-lattice antiferromagnets (2016)
Journal Article
Goddard, P., Singleton, J., Franke, I., Möller, J., Lancaster, T., Steele, A., …Manson, J. (2016). Control of the third dimension in copper-based square-lattice antiferromagnets. Physical review B, 93(9), Article 094430. https://doi.org/10.1103/physrevb.93.094430

Using a mixed-ligand synthetic scheme, we create a family of quasi-two-dimensional antiferromagnets, namely, [Cu(HF2)(pyz)2]ClO4 [pyz = pyrazine], [CuL2(pyz)2](ClO4)2 [L = pyO = pyridine-N-oxide and 4-phpy-O = 4-phenylpyridine-N-oxide. These material... Read More about Control of the third dimension in copper-based square-lattice antiferromagnets.