Signatures of canted antiferromagnetism in infinite-layer nickelates studied by x-ray magnetic dichroism

Abstract

We report an experimental study of the magnetic properties of infinite-layer Nd1-xSrxNiO2 thin films by x-ray magnetic circular dichroism (XMCD) at Ni L3,2 and Nd M5,4 edges. We show that at low temperatures the out-of-plane component of the Ni1+ spin-moment is characterized by a rapid increase for magnetic fields below 1T , followed by a slower linear increase reaching a spin-moment value of 0.25uB/Ni at 9T in the case of superconducting Nd0.8Sr0.2NiO2. On the other hand, the Nd M5,4 XMCD shows a clear paramagnetic behaviour, which make both Ni- and Nd-spin-sublattices fully uncorrelated.The magnetic field and temperature dependencies of the Ni L3,2 XMCD data can be explained by assuming an out-of-plane canting of the strongly in-plane anti-ferromagnetic ordered Ni1+ spins. A symmetry lowering of the NiO2 planes observed via four-dimensional scanning transmission electron microscopy, triggering a DMI, can be responsible of the proposed Ni1+ spin-canting at zero-field. The resulting out-of-plane weak-ferromagnetic coupling under magnetic field explains the relatively large spin-moment and its magnetic field and temperature dependence.

References in corpus (18)

• Aspects of the Synthesis of Thin Film Superconducting Infinite-Layer Nickelates
• Charge and spin order dichotomy in NdNiO${}_2$ driven by SrTiO${}_3$ capping layer
• Intrinsic magnetism in superconducting infinite-layer nickelates
• Orbital and Spin Character of Doped Carriers in Infinite-Layer Nickelates
• Isotropic Pauli-Limited Superconductivity in the Infinite Layer Nickelate Nd${}_{0.775}$Sr${}_{0.225}$NiO${}_2$
• Fluctuation-frustrated flat band instabilities in NdNiO2
• Magnetic correlations in infinite-layer nickelates: an experimental and theoretical multi-method study
• Absence of $3a_0$ Charge Density Wave Order in the Infinite Layer Nickelates
• Doping-dependent character and possible magnetic ordering of NdNiO${}_2$
• From Early Theories of Dzyaloshinskii-Moriya Interactions in Metallic Systems to Today's Novel Roads
• Intrinsic Spin Susceptibility and Pseudogap-like Behavior in Infinite-Layer LaNiO2
• Core-Level X-Ray Spectroscopy of Infinite-Layer Nickelate: LDA+DMFT Study
• Charge distribution across capped and uncapped infinite-layer neodymium nickelate thin films
• Synthesis of infinite-layer nickelates and influence of the capping-layer on magnetotransport
• Scanning SQUID study of ferromagnetism and superconductivity in infinite-layer nickelates
• Nature of the magnetic coupling in infinite-layer nickelates versus cuprates
• Emergent electronic landscapes in a novel valence-ordered nickelate with tri-component nickel coordination
• Unusual direction-dependent magnetic orbital moment obtained from X-ray magnetic circular dichroism in a multiferroic oxide system

Cited by in corpus (3)

• Superconductivity in PrNiO2 infinite-layer nickelates
• Superconductivity in the parent infinite-layer nickelate NdNiO${}_2$
• Electronic correlations and spin-charge-density stripes in double-layer La${}_3$Ni${}_2$O${}_7$