What question did this study set out to answer?

Review experimental evidence of low-temperature magnetic relaxation across diverse magnetic structures to evaluate theoretical models of quantum tunneling of magnetization.

May 15, 1993Journal of Applied PhysicsOpen Access

Quantum tunneling in magnetic systems of various sizes (invited)

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Authors

BBB. BarbaraUniversity of Calabria LSL. C. SampaioUniversité Paris-Sud JWJ.-E. WegroweCentre National de la Recherche Scientifique

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Implication

Literature review demonstrates temperature-independent magnetic relaxation in diverse magnetic structures at low temperatures, indicating macroscopic quantum tunneling of magnetization.

Key Points

Review experimental evidence of low-temperature magnetic relaxation across diverse magnetic structures to evaluate theoretical models of quantum tunneling of magnetization.
Synthesized magnetic relaxation experiments across ferromagnetic nanoparticles, thin films, domain wall junctions, and bulk single crystals.
Analyzed the transition between high-temperature thermal fluctuation regimes and low-temperature quantum fluctuation regimes.
Evaluated quantum dissipation modeling via theoretical frameworks utilizing a time-dependent WKB exponent.
Magnetic relaxation rates transitioned from strongly temperature-dependent behavior at high temperatures to temperature-independent plateaus at low temperatures across multiple magnetic systems.
Low-temperature magnetic relaxation behavior matched theoretical predictions for macroscopic quantum tunneling of magnetization.
Large and complex dissipative systems required a time-dependent WKB exponent to accurately describe non-exponential quantum relaxation dynamics.

Cite This Study

Barbara et al. (1993) studied this question.

synapsesocial.com/papers/6a701622e5469ee92be0daec https://doi.org/10.1063/1.352508

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Implication

Literature review demonstrates temperature-independent magnetic relaxation in diverse magnetic structures at low temperatures, indicating macroscopic quantum tunneling of magnetization.

Quantum tunneling in magnetic systems of various sizes (invited)

Discussion

Member takes

Implication

Key Points

Cite This Study

Quantum tunneling in magnetic systems of various sizes (invited)

Discussion

Member takes

Implication

Key Points

Cite This Study

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