Effect of pressure on magnetic properties of mixed ferroferrimagnet(Ni.sub.0.38./sub.Mn.sub.0.62./sub.).sub.3./sub.[Cr(CN).sub.6./sub.].sub.2./sub..zH.sub.2./sub.O

0347867 - FZÚ 2011 RIV GB eng J - Journal Article
Zentková, M. - Mihalík, M. - Arnold, Zdeněk - Kamarád, Jiří
Effect of pressure on magnetic properties of mixed ferroferrimagnet(Ni_0.38Mn_0.62)₃[Cr(CN)₆]₂.zH₂O.
Journal of Physics: Conference Series. Roč. 200, č. 2 (2010), 022074/1-022074/4. ISSN 1742-6588. E-ISSN 1742-6596
R&D Projects: GA AV ČR IAA100100632
Institutional research plan: CEZ:AV0Z10100521
Keywords : magnetization * compensation temperature * magnetic field
Subject RIV: BM - Solid Matter Physics ; Magnetism

We present the results of magnetization measurements performed on the ferro–ferrimagnetic Ni_0.38Mn_0.62)₃[Cr(CN)₆]₂.zH₂O molecule–based magnet under pressures up to 0.8 GPa.Both antiferromagnetic JAF and ferromagnetic interaction JF are present in this magnet and temperature dependence of magnetization μ(T) exhibits the compensation temperature T_comp at which the sign of the magnetization is reversed.Our results indicate that JAF dominates.The Curie temperature T_C of the magnet increases with applied pressure, dT_C/dp = 10.6 KGPa^-1, due to strengthened JAF.The increase of the JAF is attributed to the enhanced value of the single electron overlapping integral S and the energy gap Δ of the mixed molecular orbitals t_2g (Mn²⁺) and t_2g (CrIII) induced by pressure.
Permanent Link: http://hdl.handle.net/11104/0188544