Magnetic Properties of a Manganese(III) Chain with Monoatomic Bridges: <i>catena</i>-MnF(salen)

Birk, Torben; Pedersen, Kasper S.; Piligkos, Stergios; Thuesen, Christian Aa.; Weihe, Høgni; Bendix, Jesper

doi:10.1021/ic2002699

Cited by 33 publications

(35 citation statements)

References 30 publications

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“…Our χ(T ) results can be simulated with J/k B ≈ 50 K [5], which is close to the value reported by Birk et al [3]. It is too early to determine if Mn(III)F(salen) is an even Haldane system or an XY material [9,10].…”

Section: Discussion and Summarysupporting

confidence: 88%

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

et al. 2014

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The low temperature magnetic response of Mn(III)F(salen), salen = H14C16N2O2, an S = 2 linear-chain system, has been studied. Using a single crystal with the eld 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 t 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 dened 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.

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Section: Discussion and Summarysupporting

confidence: 88%

“…It is too early to determine if Mn(III)F(salen) is an even Haldane system or an XY material [9,10]. The local environments of the Mn are complicated, with three distinct Mn per unit cell in a 123321 chain motif where three dierent bridging MnFMn angles are present [3]. Our characterization of this interesting material continues.…”

Section: Discussion and Summarymentioning

confidence: 99%

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

et al. 2014

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“…Previously, several batches, including the deuterated one, of as-grown, randomly arranged microcrystals provided a response similar to the data reported by Birk et al 28 Specifically, when using the Padé approximations of quantum Monte Carlo simulations, 38 the low-field magnetic susceptibility at high temperatures was well fit when J = 50 ± 2 K for g = 2.…”

Section: E Magnetometrysupporting

confidence: 78%

“…6. This arrangement was discussed by Birk et al 28 and provides a potential reason why the NPD study of an unorientated microcrystalline sample did not unambiguously detect the magnetic spin arrangement. Of course, an expanded d-spacing NPD study using a single-crystal sample could test this conjecture.…”

mentioning

confidence: 94%

Antiferromagnetic ordering in MnF(salen)

Čižmár¹,

Risset²,

Wang³

et al. 2016

J. Phys.: Condens. Matter

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Antiferromagnetic order at TN = 23 K has been identified in Mn(III)F(salen), salen = H14C16N2O2, an S = 2 linear-chain system. Using single crystals, specific heat studies performed in magnetic fields up to 9 T revealed the presence of a field-independent cusp at the same temperature where 1 H NMR studies conducted at 42 MHz observed dramatic changes in the spin-lattice relaxation time, T1, and in the linewidths. Neutron powder diffraction performed on a randomlyoriented, as-grown, deuterated (12 of 14 H replaced by d) sample of 2.2 g at 10 K and 100 K did not resolve the magnetic ordering, while low-field (less than 0.1 T) magnetic susceptibility studies of single crystals and randomly-arranged microcrystalline samples reveal subtle features associated with the transition. Ensemble these data suggest a magnetic signature previously detected at 3.8 T for temperatures below nominally 500 mK is a spin-flop field of small net moments arising from alternating subsets of three Mn spins along the chains.

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“…The secondminimal integer spin, S=2, has only several examples [8][9][10][11][12][13], and their quantum behavior still has not been clarified. The spin degrees of freedom for S=2 systems can be expected to create rich quantum states.…”

mentioning

confidence: 99%