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Tailoring Physical Properties of Crystals through Synthetic Temperature Control: A Case Study for new Polymorphic NbFeTe2 phases
Hanlin Wu, Sheng Li, Yan Lyu +11
Growth parameters play a significant role in the crystal quality and physical properties of layered materials. Here we present a case study on a van der Waals magnetic NbFeTe2 mate…
Antiferromagnetism in kagome -CuMg(OH)Br
Yuan Wei, Zili Feng, Clarina dela Cruz +5
The antiferromagnetism in -CuMg(OH)Br was studied by magnetic-susceptibility, specific-heat and neutron-diffraction measurements. The crystal structure consists of C…
Effect of Zn doping on the antiferromagnetism in kagome CuZn(OH)FBr
Zili Feng, Yuan Wei, Ran Liu +10
Barlowite Cu(OH)FBr shows three-dimensional (3D) long-range antiferromagnetism, which is fully suppressed in CuZn(OH)FBr with a kagome quantum spin liquid ground st…
Evidence for the topological order in a kagome antiferromagnet
Yuan Wei, Zili Feng, Wiebke Lohstroh +19
A Z2 quantum spin liquid hosts one of the simplest topological orders and exhibits many exotic properties due to long-range quantum entanglements. Its elementary excitations are an…
Pressure-induced polarization reversal in multiferroic
Rajit P. Chaudhury, Clarina R. dela Cruz, Bernd Lorenz +4
The low-temperature ferroelectric polarization of multiferroic is completely reversed at a critical pressure of 10 kbar and the phase transition from the incommensurate…
Pressure induced enhancement of ferroelectricity in multiferroic MnO(=Tb,Dy, and Ho)
C. R. dela Cruz, B. Lorenz, Y. Y. Sun +5
Measurements of ferroelectric polarization and dielectric constant were done on MnO (=Tb, Dy, and Ho) with applied hydrostatic pressures of up to 18 kbar. At ambient…
Pressure-Temperature Phase Diagram of Multiferroic
R. P. Chaudhury, F. Yen, C. R. dela Cruz +4
The pressure-temperature phase diagram of multiferroic is investigated for hydrostatic pressures up to 2 GPa. The stability range of the ferroelectric phase associated…
Magnetoelastic Effects and Magnetic Phase Diagram of Multiferroic
C. R. dela Cruz, B. Lorenz, Y. Y. Sun +3
The magnetoelastic coupling in multiferroic is investigated by magnetostriction measurements along the three crystallographic orientations. Strong lattice anomalies as…
Structural Anomalies at the Magnetic and Ferroelectric Transitions in (R=Tb, Dy, Ho)
C. R. dela Cruz, F. Yen, B. Lorenz +6
Strong anomalies of the thermal expansion coefficients at the magnetic and ferroelectric transitions have been detected in multiferroic . Their correlation with anomalies…
Coupling of Magnetic Order, Ferroelectricity, and Lattice Strain in Multiferroic Rare Earth Manganites
B. Lorenz, C. R. dela Cruz, F. Yen +3
Multiferroic rare earth manganites attracted recent attention because of the coexistence of different types of magnetic and ferroelectric orders resulting in complex phase diagrams…
Low temperature dielectric anomalies in HoMnO_3: The complex phase diagram
F. Yen, C. R. dela Cruz, B. Lorenz +4
The dielectric constant of multiferroic hexagonal HoMnO_3 exhibits an unprecedented diversity of anomalies at low temperatures (1.8 K< T <10 K) and under external magnetic fields r…
Strong spin-lattice coupling in multiferroic HoMnO: Thermal expansion anomalies and pressure effect
C. dela Cruz, F. Yen, B. Lorenz +4
Evidence for a strong spin-lattice coupling in multiferroic HoMnO_3 is derived from thermal expansion measurements along a- and c-axis. The magnetoelastic effect results in sizable…