Isofrequency spin-wave imaging using color center magnetometry for magnon spintronics
Samuel Mañas-Valero (Kavli institute of nanoscience Delft, TU Delft - QN/vanderSarlab)
Yasmin C. Doedes (Kavli institute of nanoscience Delft, TU Delft - QN/vanderSarlab, TU Delft - QN/Quantum Nanoscience)
Artem Bondarenko (Kavli institute of nanoscience Delft, TU Delft - QN/Quantum Nanoscience, TU Delft - QN/Blanter Group)
Michael Borst (TU Delft - QN/Quantum Nanoscience, TU Delft - QN/vanderSarlab, Kavli institute of nanoscience Delft)
Samer Kurdi (Heriot-Watt University)
Thomas Poirier (Kansas State University)
James H. Edgar (Kansas State University)
Yaroslav M. Blanter (Kavli institute of nanoscience Delft, TU Delft - QN/Quantum Nanoscience, TU Delft - QN/Blanter Group)
Toeno van der Sar (TU Delft - QN/Quantum Nanoscience, Kavli institute of nanoscience Delft)
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Abstract
Magnon spintronics aims to harness spin waves in magnetic films for information technologies. Color center magnetometry is a promising tool for imaging spin waves, using electronic spins associated with atomic defects in solid-state materials as sensors. However, two main limitations persist: the magnetic fields required for spin-wave control detune the sensor-spin detection frequency, and this frequency is further restricted by the color center nature. Here, we overcome these limitations by decoupling the sensor spins from the spin-wave control fields –selecting color centers with intrinsic anisotropy axes orthogonal to the film magnetization– and by using color centers in diamond and hexagonal boron nitride to operate at complementary frequencies. We demonstrate isofrequency imaging of field-controlled spin waves in a magnetic half-plane and show how intrinsic magnetic anisotropies trigger bistable spin textures that govern spin-wave transport at device edges. Our results establish color center magnetometry as a versatile tool for advancing spin-wave technologies.
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