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We propose inducing Bose-Einstein condensation of magnons in a magnetic insulator by a heat flow oriented toward its boundary. At a critical heat flux, the oversaturated thermal gas of magnons accumulated at the boundary precipitates the…

Mesoscale and Nanoscale Physics · Physics 2016-03-23 Yaroslav Tserkovnyak , Scott A. Bender , Rembert A. Duine , Benedetta Flebus

The inevitable Gilbert damping in magnetization dynamics is usually regarded as detrimental to spin transport. Here we apply a general feature of chiral non-Hermitian dynamics to a ferromagnetic-insulator--normal-metal heterostructure to…

Mesoscale and Nanoscale Physics · Physics 2024-04-23 Xiyin Ye , Ke Xia , Gerrit E. W. Bauer , Tao Yu

Spintronics uses spins, the intrinsic angular momentum of electrons, as an alternative for the electron charge. Its long-term goal is in the development of beyond-Moore low dissipation technology devices. Recent progress demonstrated the…

Mesoscale and Nanoscale Physics · Physics 2018-09-14 R. Lebrun , A. Ross , S. A. Bender , A. Qaiumzadeh , L. Baldrati , J. Cramer , A. Brataas , R. A. Duine , M. Kläui

We develop a model for the magnonic contribution to the unidirectional spin Hall magnetoresistance (USMR) of heavy metal/ferromagnetic insulator bilayer films. We show that diffusive transport of Holstein-Primakoff magnons leads to an…

Mesoscale and Nanoscale Physics · Physics 2019-03-06 W. P. Sterk , D. Peerlings , R. A. Duine

Altermagnets offer a promising platform for dissipationless spin transport by combining zero net magnetization with spontaneous non-relativistic spin splitting. However, their magnonic transport properties remain largely unexplored. Here,…

Mesoscale and Nanoscale Physics · Physics 2025-07-08 Sankar Sarkar , Amit Agarwal

Spin currents can modify the magnetic state of ferromagnetic ultrathin films through spin-orbit torque. They may be generated by means of spin-orbit interaction by either bulk or interfacial phenomena. Electrical transport measurements…

Mesoscale and Nanoscale Physics · Physics 2022-06-27 A. Anadón , R. Guerrero , J. A. Jover-Galtier , A. Gudín , J. M. Díez , P. Olleros-Rodríguez , R. Miranda , J. Camarero , P. Perna

Magnons are the energy quanta of fundamental spin excitations, namely spin waves, and they can make a considerable contribution to energy transport in some magnetic materials in a similar manner as lattice vibration waves or phonons. The…

Converting angular momentum between different degrees of freedom within a magnetic material results from a dynamic interplay between electrons, magnons and phonons. This interplay is pivotal to implementing spintronic device concepts that…

Recent experimental and theoretical studies focus on spin-mediated heat currents at interfaces between normal metals and magnetic insulators. We resolve conflicting estimates for the order of magnitude of the spin transfer torque by…

Materials Science · Physics 2015-05-27 Xingtao Jia , Kai Liu , Ke Xia , Gerrit E. W. Bauer

Experimental and theoretical aspects of Hall-type transport of spins in magnetic insulators are reviewed, with emphasis on their spin chirality origin. A general formalism for linear response theory of thermal Hall transport in the spin…

Strongly Correlated Electrons · Physics 2016-12-22 Jung Hoon Han , Hyunyong Lee

Spin pumping has significant implications for spintronics, providing a mechanism to manipulate and transport spins for information processing. Understanding and harnessing spin currents through spin pumping is critical for the development…

Magnetic torques generated through spin-orbit coupling promise energy-efficient spintronic devices. It is important for applications to control these torques so that they switch films with perpendicular magnetizations without an external…

We calculate the effects of the spin-lattice coupling on the magnon spectrum of thin ferromagnetic films consisting of the magnetic insulator yttrium-iron garnet. The magnon-phonon hybridisation generates a characteristic minimum in the…

Strongly Correlated Electrons · Physics 2014-05-22 Andreas Rückriegel , Peter Kopietz , Dmytro A. Bozhko , Oleksandr A. Serga , Burkard Hillebrands

Spin-orbit coupling in inversion-asymmetric magnetic crystals and structures has emerged as a powerful tool to generate complex magnetic textures, interconvert charge and spin under applied current, and control magnetization dynamics.…

Mesoscale and Nanoscale Physics · Physics 2019-10-02 A. Manchon , J. Zelezný , I. M. Miron , T. Jungwirth , J. Sinova , A. Thiaville , K. Garello , P. Gambardella

We study the magnon spin transport in the magnetic insulator yttrium iron garnet (YIG) in a nonlocal experiment and compare the magnon spin excitation and detection for the heavy metal paramagnetic electrodes platinum (Pt|YIG|Pt) and…

Mesoscale and Nanoscale Physics · Physics 2018-06-05 Jing Liu , Ludo J. Cornelissen , Juan Shan , Bart J. van Wees , Timo Kuschel

Antiferromagnetic materials feature intrinsic ultrafast spin dynamics, making them ideal candidates for future magnonic devices operating at THz frequencies. A major focus of current research is the investigation of optical methods for the…

The field of magnonics, which utilizes propagating spin waves for nano-scale transmission and processing of information, has been significantly advanced by the advent of the spin-orbit torque. The latter phenomenon can allow one to overcome…

Mesoscale and Nanoscale Physics · Physics 2020-05-05 V. E. Demidov , S. Urazhdin , A. Anane , V. Cros , S. O. Demokritov

We observe amplification of spin-wave packets propagating along a film of yttrium iron garnet (YIG) subject to a transverse temperature gradient. The amplification is attributed to a spin-transfer thermal torque created by spin currents…

Other Condensed Matter · Physics 2011-07-14 E. Padrón-Hernández , A. Azevedo , S. M. Rezende

The spin Hall effect in a heavy metal thin film allows to probe the magnetic properties of an adjacent magnetic insulator via magnetotransport measurements. Here, we investigate the magnetoresistive response of yttrium iron garnet/platinum…

Mesoscale and Nanoscale Physics · Physics 2021-06-30 Richard Schlitz , Sergey Granovsky , Sebastian T. B. Goennenwein

Spin torque nano-oscillators realized by magnetization dynamics trapped in a current-induced potential are reported. We fabricated Ni$_{81}$Fe$_{19}$/Pt nanostructures and measured current-induced microwave emission from the structures. The…

Mesoscale and Nanoscale Physics · Physics 2024-03-19 Takahiko Makiuchi , Naoki Kanazawa , Eiji Saitoh