Field-Induced Staggered Magnetic Order in La(2)NiO(4.133)
J. M. Tranquada, P. Wochner, A. R. Moodenbaugh, D. J. Buttrey
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 Tm = 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 > Tm 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.
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