Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2010-02-24
J. Phys.: Condens. Matter 22, 296002(2010)
Physics
Condensed Matter
Strongly Correlated Electrons
Scientific paper
10.1088/0953-8984/22/29/296002
We report the synthesis, x-ray diffraction, magnetic susceptibility and specific heat measurements on polycrystalline samples of undoped LiNi2P3O10 and samples with non-magnetic impurity (Zn2+, S = 0) and magnetic impurity (Cu2+, S = 1/2) at the Ni site. The magnetic susceptibility data show a broad maximum at around 10 K and a small anomaly at about 7 K in the undoped sample.There is a lambda-like anomaly in the specific heat at 7 K, possibly due to the onset of antiferromagnetic ordering in the system. The magnetic entropy change at the ordering temperature is close to the value corresponding to Rln(2S+1) expected for an S = 1 system. The temperature corresponding to the broad maximum and the ordering temperature both decrease on Zn and Cu substitutions and also in applied magnetic fields.
Khuntia Panchanana
Mahajan A. V.
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