TY - JOUR
T1 - Magnetic response of Mn(III)F(salen) at low temperatures
AU - Park, J. H.
AU - Risset, O. N.
AU - Shiddiq, M.
AU - Peprah, M. K.
AU - Knowles, E. S.
AU - Andrus, M. J.
AU - Beedle, C. C.
AU - Ehlers, G.
AU - Podlesnyak, A.
AU - Čižmár, E.
AU - Naglere, S. E.
AU - Hill, S.
AU - Talham, D. R.
AU - Meisel, M. W.
PY - 2014/7
Y1 - 2014/7
N2 - The low temperature magnetic response of Mn(III)F(salen), salen = H 14C16N2O2, 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=kB = 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- eld energy levels of antiferromagnetic S = 2 spins with g = 2, J=kB = 50 K, D=kB = 2:8 K, and E=kB = 0:5 K.
AB - The low temperature magnetic response of Mn(III)F(salen), salen = H 14C16N2O2, 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=kB = 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- eld energy levels of antiferromagnetic S = 2 spins with g = 2, J=kB = 50 K, D=kB = 2:8 K, and E=kB = 0:5 K.
UR - https://www.scopus.com/pages/publications/84902203733
U2 - 10.12693/APhysPolA.126.228
DO - 10.12693/APhysPolA.126.228
M3 - Article
AN - SCOPUS:84902203733
SN - 0587-4246
VL - 126
SP - 228
EP - 229
JO - Acta Physica Polonica A
JF - Acta Physica Polonica A
IS - 1
ER -