Antiferromagnetic spin dynamics in exchanged-coupled Fe/GdFeO 3 heterostructure
We investigate the ultrafast spin dynamics of an antiferromagnet in a ferromagnet/antiferromagnet heterostructure Fe/GdFeO 3 via an all-optical method. After laser irradiation, the terahertz spin precession is hard to be excited in a bare GdFeO 3 without spin reorientation phase but efficiently in F...
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Published in | Chinese physics B Vol. 30; no. 11; p. 117502 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
01.11.2021
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Abstract | We investigate the ultrafast spin dynamics of an antiferromagnet in a ferromagnet/antiferromagnet heterostructure Fe/GdFeO
3
via an all-optical method. After laser irradiation, the terahertz spin precession is hard to be excited in a bare GdFeO
3
without spin reorientation phase but efficiently in Fe/GdFeO
3
. Both quasi-ferromagnetic and impurity modes, as well as a phonon mode, are observed. We attribute it to the optical modification of interfacial exchange coupling between Fe and GdFeO
3
. Moreover, the excitation efficiency of dynamics can be modified significantly via the pump laser influence. Our results elucidate that the interfacial exchange coupling is a feasible stimulation to efficiently excite terahertz spin dynamics in antiferromagnets. It will expand the exploration of terahertz spin dynamics for antiferromagnet-based opto-spintronic devices. |
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AbstractList | We investigate the ultrafast spin dynamics of an antiferromagnet in a ferromagnet/antiferromagnet heterostructure Fe/GdFeO
3
via an all-optical method. After laser irradiation, the terahertz spin precession is hard to be excited in a bare GdFeO
3
without spin reorientation phase but efficiently in Fe/GdFeO
3
. Both quasi-ferromagnetic and impurity modes, as well as a phonon mode, are observed. We attribute it to the optical modification of interfacial exchange coupling between Fe and GdFeO
3
. Moreover, the excitation efficiency of dynamics can be modified significantly via the pump laser influence. Our results elucidate that the interfacial exchange coupling is a feasible stimulation to efficiently excite terahertz spin dynamics in antiferromagnets. It will expand the exploration of terahertz spin dynamics for antiferromagnet-based opto-spintronic devices. |
Author | Ke, Ya-Jiao Zhang, Wei Tang, Jin Li, Na Cheng, Zhao-Hua Zhang, Xiang-Qun He, Wei Su, Lei Sun, Rui Xie, Zong-Kai |
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Cites_doi | 10.1088/1361-6463/aa69e1 10.1103/PhysRevB.98.100301 10.1016/j.physb.2019.411687 10.1038/ncomms9190 10.1038/nature02659 10.1063/1.1657530 10.1016/S0304-8853(98)00266-2 10.1038/ncomms9800 10.1038/nphoton.2010.259 10.1103/RevModPhys.90.015005 10.1134/1.2142893 10.1088/0256-307X/32/6/067501 10.1038/nnano.2016.18 10.1038/nphys1369 10.1063/1.4982236 10.7498/aps.68.20190706 10.1038/nature03564 10.1002/pssr.201600441 10.1088/0022-3719/3/7/018 10.1016/j.physleta.2018.01.008 10.7498/aps.69.20201518 10.1103/PhysRevB.90.18440 10.1103/PhysRevB.10.2014 10.1103/PhysRevB.78.104301 10.1088/0256-307X/37/5/058501 10.1103/PhysRevB.74.060403 10.1002/adma.201706439 10.1038/s41567-018-0051-x 10.1103/PhysRevB.84.104421 10.1063/1.4908186 10.1038/s41563-021-00922-7 10.1016/j.nanoso.2018.03.002 10.1103/PhysRevLett.76.4624 |
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3
via an all-optical method. After... |
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