Field-Induced Staggered Magnetic Order in La(2)NiO(4.133)

TL;DR

This paper investigates how applying a magnetic field induces a specific type of magnetic order in La(2)NiO(4.133) above its magnetic transition temperature, revealing the interplay between charge stripes and magnetic moments.

Contribution

It demonstrates that magnetic fields can induce staggered magnetic order in La(2)NiO(4.133) above the magnetic transition temperature, linking charge stripe structure to magnetic phenomena.

Findings

Magnetic order drops to zero at T_m = 110.5 K.

Magnetic field induces staggered magnetic order above T_m.

Charge order persists with a period of 3a/2.

Abstract

At low temperature the holes doped into the NiO(2) planes of La(2)NiO(4.133) by the excess oxygen collect in diagonal stripes that separate narrow antiferromagnetic domains. The magnetic order drops abruptly to zero at T_m = 110.5 K, but charge order remains with a period of 3a/2. We show that application of a magnetic field in the regime T > T_m induces staggered magnetic order of period 3a due to the net magnetic moment of the high-temperature bond-centered stripes, together with the odd number of Ni spins across an antiferromagnetic domain.