Next Article in Journal
Preparation and Tribological Properties of Modified MoS2/SiC/Epoxy Composites
Previous Article in Journal
Bayesian Regularized Artificial Neural Network Model to Predict Strength Characteristics of Fly-Ash and Bottom-Ash Based Geopolymer Concrete
Previous Article in Special Issue
Magnetic and Electrical Behaviors of the Homo- and Heterometallic 1D and 3D Coordination Polymers Based on the Partial Decomposition of the [Cr(C2O4)3]3− Building Block
Article

Magnetoelectric Multiferroicity and Magnetic Anisotropy in Guanidinium Copper(II) Formate Crystal

1
Department of Physics, Faculty of Science, University of Zagreb, Bijenička cesta 32, 10000 Zagreb, Croatia
2
Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
3
Institute of Physics, Bijenička cesta 46, 10000 Zagreb, Croatia
4
Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000 Zagreb, Croatia
*
Author to whom correspondence should be addressed.
Academic Editor: Alexandros Lappas
Materials 2021, 14(7), 1730; https://doi.org/10.3390/ma14071730
Received: 12 February 2021 / Revised: 24 March 2021 / Accepted: 24 March 2021 / Published: 1 April 2021
(This article belongs to the Special Issue New Findings of Magnetic Metal-Organic Framework Compounds)
Hybrid metal-organic compounds as relatively new and prosperous magnetoelectric multiferroics provide opportunities to improve the polarization, magnetization and magneto-electric coupling at the same time, which usually have some limitations in the common type-I and type-II multiferroics. In this work we investigate the crystal of guanidinium copper (II) formate [C(NH2)3]Cu(HCOO)3 and give novel insights concerning the structure, magnetic, electric and magneto-electric behaviour of this interesting material. Detailed analysis of crystal structure at 100 K is given. Magnetization points to the copper (II) formate spin-chain phase that becomes ordered below 4.6 K into the canted antiferromagnetic (AFM) state, as a result of super-exchange interaction over different formate bridges. The performed ab-initio colinear density functional theory (DFT) calculations confirm the AFM-like ground state as a first approximation and explain the coupling of spin-chains into the AFM ordered lattice. In versatile measurements of magnetization of a crystal, including transverse component besides the longitudinal one, very large anisotropy is found that might originate from canting of the coordination octahedra around copper (II) in cooperation with the canted AFM order. With cooling down in zero fields the generation of spontaneous polarization is observed step-wise below 270 K and 210 K and the effect of magnetic field on its value is observed also in the paramagnetic phase. Measured polarization is somewhat smaller than the DFT value in the c-direction, possibly due to twin domains present in the crystal. The considerable magneto-electric coupling below the magnetic transition temperature is measured with different orientations of the crystal in magnetic field, giving altogether the new light onto the magneto-electric effect in this material. View Full-Text
Keywords: multiferroics; metal-organic perovskites; magneto-electric effect; magnetic anisotropy; canted antiferromagnet multiferroics; metal-organic perovskites; magneto-electric effect; magnetic anisotropy; canted antiferromagnet
Show Figures

Figure 1

MDPI and ACS Style

Šenjug, P.; Dragović, J.; Torić, F.; Lončarić, I.; Despoja, V.; Smokrović, K.; Topić, E.; Đilović, I.; Rubčić, M.; Pajić, D. Magnetoelectric Multiferroicity and Magnetic Anisotropy in Guanidinium Copper(II) Formate Crystal. Materials 2021, 14, 1730. https://doi.org/10.3390/ma14071730

AMA Style

Šenjug P, Dragović J, Torić F, Lončarić I, Despoja V, Smokrović K, Topić E, Đilović I, Rubčić M, Pajić D. Magnetoelectric Multiferroicity and Magnetic Anisotropy in Guanidinium Copper(II) Formate Crystal. Materials. 2021; 14(7):1730. https://doi.org/10.3390/ma14071730

Chicago/Turabian Style

Šenjug, Pavla, Jure Dragović, Filip Torić, Ivor Lončarić, Vito Despoja, Kristina Smokrović, Edi Topić, Ivica Đilović, Mirta Rubčić, and Damir Pajić. 2021. "Magnetoelectric Multiferroicity and Magnetic Anisotropy in Guanidinium Copper(II) Formate Crystal" Materials 14, no. 7: 1730. https://doi.org/10.3390/ma14071730

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop