Magnetic Properties of Disordered Li{sub 2}Co{sub 2 – x}Ni{sub x}(MoO{sub 4}){sub 3} (0 ≤ x ≤ 2) System with a Lyonsite Structure

Journal Article · Fri Nov 15 04:00:00 EST 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-019-5128-Y· OSTI ID:22919484

Bensaid, H. ^[1]; Bih, L. ^[2]; Moubah, R. ^[3]; Valente, M. A. ^[4]; Bouari, A. El ^[1]

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1. Université Hassan II de Casablanca, LPCMA, Faculté des Sciences Ben M’Sik (Morocco)
2. FST Errachidia, LPCM, Laboratory of Physico-Chemistry of Materials, Department of Chemistry (Morocco)
3. Université Hassan II de Casablanca, LPMMAT, Faculté des Sciences Ain Chock (Morocco)
4. Universidade de Aveiro, Physics Department (I3N) (Portugal)

We report on the magnetic properties of disordered Li{sub 2}Co{sub 2 – x}Ni{sub x}(MoO{sub 4}){sub 3} (0 ≤ x ≤ 2) system with a lyonsite structure, where Li{sup +}, Ni{sup 2+}, and Co{sup 2+} ions are distributed in a disordered manner in the trigonal prism and octahedral sites. All compositions were found to exhibit paramagnetic behavior at high temperature; the magnetic susceptibility was described by the modified Curie-Weiss law. The experimental effective moments were explained by spin and orbital contributions of the Co{sup 2+} ions and only the spin contribution for Ni{sup 2+} ions. The negative Curie-Weiss temperature θ indicates the existence of antiferromagnetic coupling for all compositions. At low temperature, the compounds with Co{sup 2+} ions (x = 0, 1, 1.6, and 1.8) exhibit a weak ferromagnetic state below 4 K due to intrinsic canting of antiferromagnetically coupled lattices. The compound containing only Ni{sup 2+} ions, Li{sub 2}Ni{sub 2}(MoO{sub 4}){sub 3}, exhibits a pure antiferromagnetic behavior.

• OSTI ID: 22919484
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 11 Vol. 32; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
COBALT COMPOUNDS
CURIE-WEISS LAW
FERROMAGNETISM
LITHIUM COMPOUNDS
MAGNETIC SUSCEPTIBILITY
MOLYBDATES
NICKEL COMPOUNDS
PARAMAGNETISM
SPIN