We present an implementation of all-diamond scanning probes for scanning nitrogen-vacancy (NV) magnetometry fabricated from (111)-oriented diamond material. The realized scanning probe tips on average contain single NV spins, a quarter of which have their spin quantization axis aligned parallel to the tip direction. Such tips enable single-axis vector magnetic field imaging with nanoscale resolution, where the measurement axis is oriented normal to the scan plane. We discuss how these tips bring multiple practical advantages for NV magnetometry, in particular regarding quantitative analysis of the resulting data. We further demonstrate the beneficial optical properties of NVs oriented along the tip direction, such as polarization-insensitive excitation, which simplifies optical setups needed for NV magnetometry. Our results will be impactful for scanning NV magnetometry in general and for applications in spintronics and the investigation of thin film magnets in particular.Scanning probe magnetometry using nitrogen-vacancy (NV) center electronic spins in diamond offers a unique combination of spatial resolution, magnetic field sensitivity and quantitative magnetic imaging [1,2]. These combined performance characteristics have led to room-temperature imaging of single electron spins [3], nanoscale domains in multiferroics [4] and antiferromagnets [4,5], and to cryogenic experiments addressing superconductors [6-8] and magnetism in atomically thin crystals [9]. These and other studies have demonstrated how scanning NV magnetometers can yield valuable insights into materials of high scientific and technological interest, beyond the capacity of existing nanoscale imaging methods.Magnetometry based on NV center spins [10] builds on the extraordinary properties of this point defect in diamond that consists of a nitrogen atom adjacent to a lattice vacancy ( Fig. 1(a)). The negatively charged NV center has a ground state electronic spin-1, which is quantized along the NV binding axis, e NV , and which can be readily initialized and read out by optical pumping and spin-dependent fluorescence [11]. These properties, along with the NV spin's response to magnetic fields through the Zeeman effect, render the NV spin an effective single-axis vector magnetometer, where, e.g., optically detected magnetic resonance (ODMR) can be employed for precise measurements of B NV = B ext · e NV , the projection of an external magnetic field B ext onto e NV [10].All-diamond scanning probes hosting individual NV spins in nanopillars ( Fig.
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