BISTABILITY IN ATOMIC-SCALE ANTIFERROMAGNETS PDF

Jump to navigation Jump to search A nanomagnet is a submicrometric system that presents spontaneous magnetic order magnetization at zero applied magnetic field remanence. The small size of nanomagnets prevents the formation of magnetic domains see single domain magnetic. The magnetization dynamics of sufficiently small nanomagnets at low temperatures, typically single-molecule magnets , presents quantum phenomena , such as macroscopic spin tunnelling. At larger temperatures, the magnetization undergoes random thermal fluctuations superparamagnetism which present a limit for the use of nanomagnets for permanent information storage. Canonical examples of nanomagnets are grains [1] [2] of ferromagnetic metals iron , cobalt , and nickel and single-molecule magnets. The ultimate limit in miniaturization of nanomagnets was achieved in individual Ho atoms present remanence when deposited on a atomically thin layer of MgO coating a silver film was reported by scientists from EPFL and ETH, in Switzerland.

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Google Scholar 21 Gomonay, H. Spin transfer and current-induced switching in antiferromagnets. B 81, Theory of spin torques and giant magnetoresistance in antiferromagnetic metals. B 73, Google Scholar 23 Saidaoui, H. Spin transfer torque in antiferromagnetic spin valves: from clean to disordered regimes. B 89, Google Scholar 24 Wei, Z. Changing exchange bias in spin valves with an electric current. Google Scholar 25 Gomonay, H. Symmetry and the macroscopic dynamics of antiferromagnetic materials in the presence of spin-polarized current.

B 85, Google Scholar 26 Prakhya, K. Current-induced torques between ferromagnets and compensated antiferromagnets: symmetry and phase coherence effects. Dynamics of antiferromagnets driven by spin current. Google Scholar 28 Tang, X.

Changing and reversing the exchange bias in a current-in-plane spin valve by means of an electric current. Google Scholar 29 Urazhdin, S. Effect of polarized current on the magnetic state of an antiferromagnet. Google Scholar 30 Dai, N. Impact of in-plane currents on magnetoresistance properties of an exchange-biased spin valve with an insulating antiferromagnetic layer. B 77, Google Scholar 31 Tang, X.

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Bistability in atomic-scale antiferromagnets.

Motilar Science, As the density increases and the memory elements become closer together, stray fields can result in cross-talk and a corruption of the stored information. Probing bistabillty coherence in single-atom electron spin Atomically engineered antiferromagnets consisting of a few atoms exhibit stable magnetic states at low temperature. CV Andreas Heinrich — qns. Quantum atomid-scale of the Hubbard model with dopant atoms Log in through your institution Log in with your institution via Shibboleth. EiglerAndreas J. New articles by this author. Large insulating nitride islands on Cu3Au as a template Heinrich, Bistability in Atomic-Scale Antiferromagnets The simplified model is a biochemical switch mechanism proposed by G.

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