Volume 133, Number 5, March 2021
|Number of page(s)||7|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||29 April 2021|
Quasi-two-dimensional magnetism in spin-½ square lattice compound Cu[C6H2(COO)4][H3N-(CH2)2-NH3]·3H2O
1 School of Physics, Indian Institute of Science Education and Research - Thiruvananthapuram-695551, Kerala, India
2 Department of Chemistry, Christian College - Chengannur, Alappuzha, Kerala-689122, India
3 Department of Chemistry, Amrita Vishwa Vidyapeetham - Amritapuri, Kerala-690525, India
Received: 27 November 2020
Accepted: 9 February 2021
We report the crystal growth and structural and magnetic properties of quasi-two-dimensional quantum magnet Cu[C6H2(COO)4][H3N-(CH2)2-NH3]·3H2O. It is found to crystallize in a monoclinic structure with space group . The CuO4 plaquettes are connected into a two-dimensional framework in the ab-plane through the anions of [C6H2(COO)4]4− (pyromellitic acid). The [H3N-(CH2)2-NH3]3H2O groups are located between the layers and provide a weak interlayer connection via hydrogen (H...O) bonds. The temperature-dependent magnetic susceptibility is well described by frustrated square lattice model with nearest-neighbor interaction and next-nearest-neighbor interaction . Our analysis using frustrated rectangular lattice model also confirms almost isotropic nearest-neighbour interactions ( and ) in the ab-plane and . Further, the isothermal magnetization at is also well described by a non-frustrated square lattice model with . Based on the ratio, the compound can be placed in the Néel antiferromagnetic state of the phase diagram. No signature of magnetic long-range order is detected down to 2 K.
PACS: 75.50.Ee – Antiferromagnetics / 75.10.Jm – Quantized spin models, including quantum spin frustration / 75.30.Et – Exchange and superexchange interactions
© 2021 EPLA
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.