Zachary E. Manson

Single-ion anisotropy driven chiral magnetic order in a spin-1 antiferromagnetic chain

Sheila Vaidya, S. P. M. Curley, Pascal Manuel, J. R. Stewart et autres

Chirality in magnetic systems gives rise to a wide range of exotic phenomena, yet its influence in S = 1 chains remains largely unexplored. Herein, we present a comprehensive experimental study of a chiral antiferromagnetic S = 1 chain, [ Ni ( …

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Heterometallic spin-1/2 quantum magnet under hydrostatic pressure

Matthew J. Coak, D. Kamenskyi, S. P. M. Curley, B. M. Huddart et autres

We investigate the properties of CuVOF$_4$(H$_2$O)$_6$$\cdot$H$_2$O, in which two different spin species, Cu(II) and V(IV), form antiferromagnetic spin-1/2 dimers with weak interdimer coupling provided via hydrogen bonding. Using radio-frequency susceptometry and electron-spin resonance (ESR), we show how the temperature-magnetic field spin-dimer phase …

Magnetic field induced ordering in the spin- 1 2 chiral chain compound [ Cu ( pym ) ( H 2 O ) 4 ] SiF 6 · H 2 O

A. Hernández-Melían, B. M. Huddart, S. P. M. Curley, Robert C. Williams et autres

We present single-crystal neutron diffraction, powder muon spin rotation, and pulsed-field magnetometry measurements on the Heisenberg quantum chiral chain [ Cu ( pym ) ( H 2 O ) 4 ] SiF 6 · H 2 O (pym = pyrimidine), which displays …

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Electron-density analysis of halide...halide through-space magnetic exchange

Rebecca Scatena, Zachary E. Manson, Jamie L. Manson, David R. Allan et autres

We present a combined experimental and density functional theory study that characterizes the charge and spin density in Ni X 2 (3,5-lutidine) 4 ( X = Cl, Br and I). In this material, magnetic exchange interactions occur via Ni 2+ –halide...halide–Ni 2+ …

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Magnetic properties of a staggered S = 1 chain with an alternating single-ion anisotropy direction

Sheila Vaidya, S. P. M. Curley, Pascal Manuel, J. R. Stewart et autres

Materials composed of spin-1 antiferromagnetic (AFM) chains are known to adopt complex ground states that are sensitive to the single-ion-anisotropy (SIA) energy ( D ), and intrachain ( J 0 ) and interchain ( J 1 , 2 ′ ) exchange energy …

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Pseudo-easy-axis anisotropy in antiferromagnetic S = 1 diamond-lattice systems

Sheila Vaidya, A. Hernández-Melían, J.P. Tidey, S. P. M. Curley et autres

We investigate the magnetic properties of S = 1 antiferromagnetic diamond-lattice, Ni X 2 ( pyrimidine ) 2 ( X = Cl , Br ) , hosting a single-ion anisotropy (SIA) orientation which alternates between neighboring sites. Through neutron diffraction measurements of …

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Magnetic properties of a staggered $S=1$ chain Ni(pym)(H$_{2}$O)$_{2}$(NO$_{3}$)$_{2}$ with an alternating single-ion anisotropy direction

Sheila Vaidya, S. P. M. Curley, P. Manuel, J. R. Stewart et autres

Materials composed of spin-1 antiferromagnetic (AFM) chains are known to adopt complex ground states which are sensitive to the single-ion-anisotropy (SIA) energy ($D$), and intrachain ($J_{0}$) and interchain ($J'_{i}$) exchange energy scales. While theoretical and experimental studies have extended this model to …

High Field Electrical Polarization and Magnetoelectric Coupling in Chiral Magnet [Cu(pym)(H2O)4]SiF6·H2O

Avery L. Blockmon, Minseong Lee, Shengzhi Zhang, Zachary E. Manson et autres

The Heisenberg antiferromagnetic chain is a canonical model for understanding many-body gaps that emerge in quantum magnets, and as a result, there has been significant work on this class of materials for much of the past century. Chiral chains, on the other …

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Pseudo-easy-axis anisotropy in antiferromagnetic $S=1$ diamond-lattice systems Ni$X_{2}$(pym)$_{2}$

Sheila Vaidya, A. Hernández-Melían, J.P. Tidey, S. P. M. Curley et autres

We investigate the magnetic properties of $S=1$ antiferromagnetic diamond lattice, Ni$X_{2}$(pyrimidine)$_{2}$ ($X$ = Cl, Br), hosting a single-ion anisotropy (SIA) orientation which alternates between neighbouring sites. Through neutron diffraction measurements of the $X$ = Cl compound, the ordered state spins are found …

Asymmetric phase diagram and dimensional crossover in a system of spin- 12 dimers under applied hydrostatic pressure

Matthew J. Coak, S. P. M. Curley, Z. Hawkhead, J.P. Tidey et autres

We present the magnetic and structural properties of $[\mathrm{Cu}{(\mathrm{pyrazine})}_{0.5}(\mathrm{glycine})]{\mathrm{ClO}}_{4}$ under applied pressure. As previously reported, at ambient pressure this material consists of quasi-two-dimensional layers of weakly coupled antiferromagnetic dimers which undergo Bose-Einstein condensation of triplet excitations between two magnetic field-induced quantum critical …

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Asymmetric phase diagram and dimensional crossover in a system of spin-1/2 dimers under applied hydrostatic pressure

Matthew J. Coak, S. P. M. Curley, Z. Hawkhead, J. P. Tidey et autres

We present the magnetic and structural properties of [Cu(pyrazine)$_{0.5}$(glycine)]ClO$_4$ under applied pressure. As previously reported, at ambient pressure this material consists of quasi-two-dimensional layers of weakly coupled antiferromagnetic dimers which undergo Bose-Einstein condensation of triplet excitations between two magnetic field-induced quantum critical …

Chemical control of magnetism in S = 1 quantum materials: new twists on a seemingly old theme

Jamie L. Manson, Jacqueline A. Villa, Danielle Y. Villa, Isabel Calderon-Lin et autres