Unraveling the nature of thermally induced spin reorientation in NdFe1-xCrxO3

TL;DR

This paper investigates the temperature-driven spin reorientation in NdFe1-xCrxO3 using molecular field theory, revealing how magnetic moments' angles change with temperature, aiding the design of advanced magnetic materials.

Contribution

It introduces a theoretical model explaining the spin reorientation mechanism in NdFe1-xCrxO3 based on four-sublattices molecular field theory, highlighting temperature-dependent magnetic coupling.

Findings

Monotonic decrease in the angle between Nd3+ and Cr3+/Fe3+ moments with temperature.

Theoretical insights into the magnetic coupling and spin reorientation in NdFe1-xCrxO3.

Foundation for designing multifunctional magnetic materials.

Abstract

Understanding spin control mechanisms is an important part of condensed matter physics and the theoretical basis for designing spintronic devices. In this letter, based on four-sublattices molecular field theory, we propose that the underlying NdFe1-xCrxO3 magnetic mechanism is driven by spin reorientation sensitive to temperature. The actual coupling angular momentum, angle between the Nd3+ and Cr3+/Fe3+ moments at the given temperature is realized via the Nd3+ magnetic moment projection onto the Cr3+/Fe3+ plane. As the temperature increases, the angle between the moment of Nd3+ and the moment of Cr3+/Fe3+ decreases monotonically. In this work, the magnetic mechanism of NdFe1-xCrxO3 (x=0.1, 0.9), the close relationship between A/B angle and temperature are presented, which laid a theoretical foundation for the design of new multifunctional magnetic materials.