Neutron diffraction study of the magnetic long-range order in Tb

O.W. Dietrich, Jens Aage Als-Nielsen

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    Abstract

    Like other heavy rare-earth metals, Tb exhibits a magnetic phase with a spiral structure. This appears within the temperature region from 216 to 226deg K between the ferromagnetic phase and the paramagnetic phase. The transition between ferromagnetic and spiral structure is of first order and implies no change in the long-range order. In the close vicinity of the Neacuteel temperature TN = 226deg K the spiral magnetic long-range order varies as (TN-T)0.25plusmn 0.01, whereas the total order within a wider temperature range roughly follows (TN-T)1/3. The turn angle per layer varies from 16.5deg at 216deg K to 20.7deg at 226deg K. The temperature variation of the transverse magnetostriction has also been measured and was found to vary approximately in proportion to the square of the magnetic long-range order.
    Original languageEnglish
    JournalPHYSICAL REVIEW
    Volume162
    Issue number2
    Pages (from-to)315-320
    ISSN0031-899X
    DOIs
    Publication statusPublished - 1967

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