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28 March 2024 |
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Article overview
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Visualization of ferromagnetic domains in TbNi$_2$B$_2$C and
ErNi$_2$B$_2$C single crystals: Weak ferromagnetism and its coexistence with
superconductivity | I.S. Veschunov
; L.Ya. Vinnikov
; S.L. Bud'ko
; P.C. Canfield
; | Date: |
22 Jun 2007 | Abstract: | The magnetic flux structure in the basal plane, (001), of single crystals of
superconducting (R = Er) and non-superconducting (R = Tb) RNi$_2$B$_2$C was
studied by high resolution Bitter decoration at temperatures below $T_c$
(superconducting transition) and/or $T_N$ (antiferromagnetic transition). For
both materials two sets of domain boundaries, in {110} and {100} planes,
were observed. The temperature ranges in which the {100} domain boundaries
were observed in TbNi$_2$B$_2$C and ErNi$_2$B$_2$C coincide with the weak
ferromagnetic (WFM) ordering in these materials. On the other hand, the {110}
twin boundaries - the antiferromagnetic domain boundaries - were observed in
both compounds below $T_N$. The possibility of interpretation of {100}
boundaries as Bloch domain walls in the weakly ferromagnetic phase, for $T <
T_{WFM} < T_N$ (TbNi$_2$B$_2$C) or $T < T_{WFM} < T_N < T_c$ (ErNi$_2$B$_2$C)
is discussed. | Source: | arXiv, arxiv.0706.3340 | Services: | Forum | Review | PDF | Favorites |
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