Magnetic properties of quasi-one-dimensional antiferromagnets (Y1-xNdx)(2)BaNiO5 (x=1, 0.15)

作者：Popova E A^*; Klimin S A; Popova M N; Klingeler R; Tristan N; Buechner B; Vasiliev A N

来源：Journal of Magnetism and Magnetic Materials, 2013, 331: 133-139.

DOI：10.1016/j.jmmm.2012.11.019

• Haldane chain
• Nickelate
• Chain breaks

We present the magnetic properties of (Y(1-x)Ndx)(2)BaNiO5 (x = 1, 0.15) investigated by means of specific heat, magnetic susceptibility, and spectroscopic measurements. Magnetic ordering occurs at 47K and 13 K in the compounds with x = 1 and x = 0.15, respectively. We estimate the magnetic contribution of the eodymium subsystem to magnetization and specific heat using temperature dependences of the splitting of ground Kramers doublet of Nd3+ ion obtained from spectroscopic experiment. We show that both Nd-Ni and Nd-Nd interactions should be taken into account. An origin of the observed spinglass state below similar to 5 K and a contribution of the Ni chain breaks to the magnetization and specific heat are discussed.

• 出版日期2013-4