Successive Magnetic-Field-Induced Transitions and Colossal Magnetoelectric Effect in Ni_{3}TeO_{6}.

Area of Science:

• Condensed Matter Physics
• Materials Science
• Magnetism

Background:

• Polar antiferromagnets exhibit complex magnetic behaviors and magnetoelectric coupling.
• Understanding high-field magnetic transitions is crucial for novel electronic applications.

Purpose of the Study:

• To investigate the metamagnetic phase transition in Ni_{3}TeO_{6} at 52 T.
• To characterize the colossal magnetoelectric effect associated with this transition.
• To elucidate the microscopic mechanisms driving the transition and polarization change.

Main Methods:

• Experimental measurements of magnetic phase transitions up to 52 T.
• Density-functional theory calculations for microscopic modeling.
• Analysis of spin structures and exchange interactions.

Main Results:

• Discovery of a metamagnetic phase transition in Ni_{3}TeO_{6} at 52 T.
• Observation of a colossal magnetoelectric effect with a polarization change of 0.3 μC/cm^{2}.
• Identification of competing exchange interactions and the exchange-striction mechanism as drivers of the transition.

Conclusions:

• The 52 T transition in Ni_{3}TeO_{6} is driven by complex magnetic interactions.
• This study provides new insights into designing materials with strong magnetoelectric coupling.
• The findings pave the way for advanced magnetoelectric devices.