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Influence of Pressure on the Magnetic Response of the Low-Dimensional Quantum Magnet Cu(H₂O)₂(C₂H₈N₂)SO₄

100%

Peprah M., VanGennep D., Blasiola B., Quintero P., Tarasenko R., Xia J., Hamlin J., Meisel M., Orendáčová A.

Acta Physica Polonica A

2017

vol. 131

issue 4

901-903

The influence of pressure on the low-dimensional molecular magnet Cu(H₂O)₂(en)SO₄ (en = ethylenediamine = C₂H₈N₂) has theoretically been shown to affect the exchange interactions of the material. Herein, the results of an experimental study of hydrostatic pressure effects on the temperature dependence of the magnetization are reported. Using two different pressure cells, the magnetization measurements were performed between 2 K and 9.6 K with pressures ranging from ambient to 5.0 GPa. The data preliminarily suggest the presence of a shift in the magnetization peak of the material at the lowest temperatures and at the highest applied pressures. These data serve as a guide for future experimental work employing pressure to study this intriguing system.

Magnetic Response of Mn(III)F(salen) at Low Temperatures

81%

Park J., Risset O., Shiddiq M., Peprah M., Knowles E., Andrus M., Beedle C., Ehlers G., Podlesnyak A., Čižmár E., Nagler S., Hill S., Talham D., Meisel M.

vol. 126

issue 1

228-229

The low temperature magnetic response of Mn(III)F(salen), salen = H_{14}C_{16}N_{2}O_{2}, an S=2 linear-chain system, has been studied. Using a single crystal with the field applied perpendicular to the chain direction, torque magnetometry, down to 20 mK and up to 18 T, revealed a feature at 3.8 T when T ≤ 400 mK. ESR ( ≈200 GHz) studies, using single crystals at 4 K and in 5 T, have not detected any signal. In 10 mT, the temperature dependence of the susceptibility of powder-like samples can be reasonably fit when J/k_{B}=50 K and g=2. In addition, these data are unchanged for P ≤1.0 GPa. Using a randomly-oriented, powder-like, deuterated (12 of 14 H replaced by D) sample of 2.2 g at 270 mK, neutron scattering data, acquired with the Cold Neutron Chopper Spectrometer at the Spallation Neutron Source, show several well defined excitations that may be from the zero-field energy levels of antiferromagnetic S=2 spins with g=2, J/k_{B}=50 K, D/k_{B}=2.8 K, and E/k_{B}=0.5 K.

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2 Acta Physica Polonica A

1 2017

1 2014

2 Meisel M.

2 Peprah M.

1 Andrus M.

1 Beedle C.

1 Blasiola B.

1 Ehlers G.

1 Hamlin J.

1 Hill S.

1 Knowles E.

1 Nagler S.

1 Orendáčová A.

1 Park J.

1 Podlesnyak A.

1 Quintero P.

1 Risset O.

1 Shiddiq M.

1 Talham D.

1 Tarasenko R.

1 VanGennep D.

1 Xia J.

1 Čižmár E.

Search results

Influence of Pressure on the Magnetic Response of the Low-Dimensional Quantum Magnet Cu(H₂O)₂(C₂H₈N₂)SO₄

Magnetic Response of Mn(III)F(salen) at Low Temperatures