Measuring acoustic mode resonance alone as a sensitive technique to extract antiferromagnetic coupling strength

Y. Wei, P. Svedlindh, Mikhail Kostylev, M. Ranjbar, R.K. Dumas, J. Åkerman

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    © 2015 American Physical Society. We have studied static and dynamic magnetic properties of a general asymmetric trilayer system using numerical simulations. For ferromagnetic, 90, and antiferromagnetic coupling, the magnetizations of the two magnetic layers exhibit one, two, and three phases with increasing external field, respectively. The total magnetization and ferromagnetic resonance accordingly follow these phases of the magnetization vectors. The resonance condition is related to the interlayer coupling strength in such a way that a larger coupling constant yields a higher value of fres/H, where fres is the resonance frequency at the external magnetic field H. Based on the simulation results, it is proposed that measurements of the acoustic mode resonance alone at unsaturated conditions provide a sensitive and accurate technique to extract the antiferromagnetic coupling strength. The technique is demonstrated experimentally with the broadband ferromagnetic resonance measurements of two trilayer films with weak and strong coupling strengths. The technique offers an efficient and sensitive method for antiferromagnetic coupling strength extraction, yielding coupling constant values with a precision of better than 0.03 erg/cm2. Also, separation of the bilinear and biquadratic coupling contributions is possible with the technique.
    Original languageEnglish
    Pages (from-to)064418-1 - 064418-8
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume92
    Issue number6
    DOIs
    Publication statusPublished - 2015

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    Ferromagnetic resonance
    Magnetization
    acoustics
    Magnetic properties
    ferromagnetic resonance
    magnetization
    Magnetic fields
    Computer simulation
    interlayers
    simulation
    magnetic properties
    broadband
    magnetic fields

    Cite this

    @article{3d73f8c4f7c342f3beb02220c8760558,
    title = "Measuring acoustic mode resonance alone as a sensitive technique to extract antiferromagnetic coupling strength",
    abstract = "{\circledC} 2015 American Physical Society. We have studied static and dynamic magnetic properties of a general asymmetric trilayer system using numerical simulations. For ferromagnetic, 90, and antiferromagnetic coupling, the magnetizations of the two magnetic layers exhibit one, two, and three phases with increasing external field, respectively. The total magnetization and ferromagnetic resonance accordingly follow these phases of the magnetization vectors. The resonance condition is related to the interlayer coupling strength in such a way that a larger coupling constant yields a higher value of fres/H, where fres is the resonance frequency at the external magnetic field H. Based on the simulation results, it is proposed that measurements of the acoustic mode resonance alone at unsaturated conditions provide a sensitive and accurate technique to extract the antiferromagnetic coupling strength. The technique is demonstrated experimentally with the broadband ferromagnetic resonance measurements of two trilayer films with weak and strong coupling strengths. The technique offers an efficient and sensitive method for antiferromagnetic coupling strength extraction, yielding coupling constant values with a precision of better than 0.03 erg/cm2. Also, separation of the bilinear and biquadratic coupling contributions is possible with the technique.",
    author = "Y. Wei and P. Svedlindh and Mikhail Kostylev and M. Ranjbar and R.K. Dumas and J. {\AA}kerman",
    year = "2015",
    doi = "10.1103/PhysRevB.92.064418",
    language = "English",
    volume = "92",
    pages = "064418--1 -- 064418--8",
    journal = "Physical Review B",
    issn = "1098-0121",
    publisher = "American Physical Society",
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    Measuring acoustic mode resonance alone as a sensitive technique to extract antiferromagnetic coupling strength. / Wei, Y.; Svedlindh, P.; Kostylev, Mikhail; Ranjbar, M.; Dumas, R.K.; Åkerman, J.

    In: Physical Review B - Condensed Matter and Materials Physics, Vol. 92, No. 6, 2015, p. 064418-1 - 064418-8.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Measuring acoustic mode resonance alone as a sensitive technique to extract antiferromagnetic coupling strength

    AU - Wei, Y.

    AU - Svedlindh, P.

    AU - Kostylev, Mikhail

    AU - Ranjbar, M.

    AU - Dumas, R.K.

    AU - Åkerman, J.

    PY - 2015

    Y1 - 2015

    N2 - © 2015 American Physical Society. We have studied static and dynamic magnetic properties of a general asymmetric trilayer system using numerical simulations. For ferromagnetic, 90, and antiferromagnetic coupling, the magnetizations of the two magnetic layers exhibit one, two, and three phases with increasing external field, respectively. The total magnetization and ferromagnetic resonance accordingly follow these phases of the magnetization vectors. The resonance condition is related to the interlayer coupling strength in such a way that a larger coupling constant yields a higher value of fres/H, where fres is the resonance frequency at the external magnetic field H. Based on the simulation results, it is proposed that measurements of the acoustic mode resonance alone at unsaturated conditions provide a sensitive and accurate technique to extract the antiferromagnetic coupling strength. The technique is demonstrated experimentally with the broadband ferromagnetic resonance measurements of two trilayer films with weak and strong coupling strengths. The technique offers an efficient and sensitive method for antiferromagnetic coupling strength extraction, yielding coupling constant values with a precision of better than 0.03 erg/cm2. Also, separation of the bilinear and biquadratic coupling contributions is possible with the technique.

    AB - © 2015 American Physical Society. We have studied static and dynamic magnetic properties of a general asymmetric trilayer system using numerical simulations. For ferromagnetic, 90, and antiferromagnetic coupling, the magnetizations of the two magnetic layers exhibit one, two, and three phases with increasing external field, respectively. The total magnetization and ferromagnetic resonance accordingly follow these phases of the magnetization vectors. The resonance condition is related to the interlayer coupling strength in such a way that a larger coupling constant yields a higher value of fres/H, where fres is the resonance frequency at the external magnetic field H. Based on the simulation results, it is proposed that measurements of the acoustic mode resonance alone at unsaturated conditions provide a sensitive and accurate technique to extract the antiferromagnetic coupling strength. The technique is demonstrated experimentally with the broadband ferromagnetic resonance measurements of two trilayer films with weak and strong coupling strengths. The technique offers an efficient and sensitive method for antiferromagnetic coupling strength extraction, yielding coupling constant values with a precision of better than 0.03 erg/cm2. Also, separation of the bilinear and biquadratic coupling contributions is possible with the technique.

    U2 - 10.1103/PhysRevB.92.064418

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    SP - 064418-1 - 064418-8

    JO - Physical Review B

    JF - Physical Review B

    SN - 1098-0121

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