Study on additive effective interaction between vertical Bloch lines

Tang, Gongguo; Liu, Y.; Hu, Hanjun; Liu, Y. P.; Sun, Hui; Nie, Xin

doi:10.1002/pssb.200301867

Cited by 5 publications

References 16 publications

(13 reference statements)

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Temperature stability and linear magnetic field response of the magnetoresistance in Ag_0.07–La_0.67Sr_0.13Ag_0.08Ä_0.12MnO₃ composite

Tang

Liu

et al. 2006

Physica Status Solidi (a)

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Composite bulk polycrystalline samples of Agδ –La0.67Sr0.33–x –y Agx –δ Δy +δ MnO3 (x = 0.00, 0.15, 0.20, y = 0.00; and x = 0.15, y = 0.03, 0.05, with Δ representing cation vacancy at La site) were successfully synthesized using the sol–gel method. It is found that there are two phases in the samples, a cubic structure Ag phase and a perovskite phase. An experimental method for estimating the Ag phase content δ in the samples is presented. The Ag content x – δ and the cation vacancy y + δ were calculated. The Ag phase content and the lattice parameters of the two phases were also investigated using the Rietveld refinement method. The Ag phase contents obtained from the two methods are very close. The influences of x – δ and y + δ on the lattice parameters of the perovskite phase, the Curie temperature (T C), the metallic–semiconducting transition temperature (T MI), the magnetoresistance (MR), the peak temperature (T MR) of the MR, and the temperature stability of the MR of the samples were examined. The Mn–O bond length L B of the perovskite phase increases with increasing x – δ . However T C, T MI, and T MR decrease with increasing L B. For the sample Ag0.07–La0.67Sr0.13Ag0.08Δ0.12MnO3, under an applied magnetic field of 1.8 T, the MR is stable (9.41 ± 0.32%) in the temperature range 275–305 K; the MR increases linearly with magnetic field up to 1.5 T; and the change of MR with magnetic field, S MR = d(MR)/d(μ 0H ), is as high as about 5.2%/T. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Temperature stability and linear magnetic field response of the magnetoresistance in Ag_0.07–La_0.67Sr_0.13Ag_0.08Ä_0.12MnO₃ composite

Tang

Liu

et al. 2006

Physica Status Solidi (a)

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Influence of temperature and in‐plane fields on vertical Bloch lines in the walls of the first kind of dumbbell domain

Suping

Guo

et al. 2005

Physica Status Solidi (b)

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The stability of vertical Bloch lines (VBLs) in the domain walls of the first kind of dumbbell domains (IDs) in garnet bubble films as regards both temperature and in‐plane field is investigated experimentally. It is found that there exists a critical in‐plane field range [Hip(1)(T), Hip(2)(T)] for the VBLs' annihilation in the walls of IDs at various temperatures from room temperature to T0. When Hip ≤ Hip(1)(T), the number of VBLs in the domain walls of IDs is constant; when Hip(1)(T) < Hip < Hip(2)(T), the VBLs in the domain walls of IDs will annihilate gradually and the number of annihilations increases with increasing Hip; when Hip ≥ Hip(2)(T), the VBLs in the domain walls of IDs annihilate completely. Moreover, the range [Hip(1)(T), Hip(2)(T)] decreases with increasing temperature, while the values of Hip(1)(T) and Hip(2)(T) also decrease, and reach zero at T0′ and T0, respectively. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Stability of vertical‐bloch‐line chains in the walls of the first kind of dumbbell domains subjected to static bias field at various in‐plane fields

Wang

Guo

Zhen

et al. 2006

Physica Status Solidi (b)

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For the first kind of dumbbell domains (IDs) of garnet bubble films, the annihilating process of vertical bloch line chains (VBLs) subjected to an in‐plane field ($ H_{\rm ip} $) at various static bias fields ($ H_{\rm b} $) was experimentally studied. Three important relations have been obtained, which are the relations between $ H_{\rm ip}^{(1)} $, $ H_{\rm ip}^* $, $ H_{\rm ip}^{(2)} $ and $ H_{\rm b} $. here, $ H_{\rm ip}^{(1)} $ is the initial critical in‐plane field where VBLs in the walls of IDs are annihilated, i.e. some of the ID begin to be softened, $ H_{\rm ip}^* $ is designated as the in‐plane field where ID begins to soften to SB and $ H_{\rm ip}^{(2)} $ is the lowest in‐plane field at which all VBLs in the walls of IDs annihilate completely. by the experiment of the so‐called “tail‐cut”, it is found that each $ H_{\rm ip} $ from $ H_{\rm ip}^{(1)} $ to $ H_{\rm ip}^{(2)} $ corresponds to a certain length of VBL chains in the walls of IDs. the higher $ H_{\rm ip} $, the shorter the VBL chains. $ H_{\rm ip}^{(1)} $ and $ H_{\rm ip}^{(2)} $ correspond to the longest and shortest VBLs, respectively. it is also found that both $ H_{\rm ip} $ and $ H_{\rm b} $ play an important role during the annihilating of vbl chains in the walls of IDs. If $ H_{\rm b} $ is lower, $ H_{\rm ip}^{(1)} $, $ H_{\rm ip}^* $ and $ H_{\rm ip}^{(2)} $ are unchanged. with increasing $ H_{\rm b} $, especially being close to or higher than the standard stripe‐to‐bubble transition field ($ H_{\rm sb} \prime $), they all rapidly decrease. And they do not change further when $ H_{\rm b} $ is a little higher than the minimum collapse field of OHBs ($ H_0 \prime $). (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Study on additive effective interaction between vertical Bloch lines

Cited by 5 publications

References 16 publications

Temperature stability and linear magnetic field response of the magnetoresistance in Ag_0.07–La_0.67Sr_0.13Ag_0.08Ä_0.12MnO₃ composite

Temperature stability and linear magnetic field response of the magnetoresistance in Ag_0.07–La_0.67Sr_0.13Ag_0.08Ä_0.12MnO₃ composite

Influence of temperature and in‐plane fields on vertical Bloch lines in the walls of the first kind of dumbbell domain

Stability of vertical‐bloch‐line chains in the walls of the first kind of dumbbell domains subjected to static bias field at various in‐plane fields

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Study on additive effective interaction between vertical Bloch lines

Cited by 5 publications

References 16 publications

Temperature stability and linear magnetic field response of the magnetoresistance in Ag0.07–La0.67Sr0.13Ag0.08Ä0.12MnO3 composite

Temperature stability and linear magnetic field response of the magnetoresistance in Ag0.07–La0.67Sr0.13Ag0.08Ä0.12MnO3 composite

Influence of temperature and in‐plane fields on vertical Bloch lines in the walls of the first kind of dumbbell domain

Stability of vertical‐bloch‐line chains in the walls of the first kind of dumbbell domains subjected to static bias field at various in‐plane fields

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Temperature stability and linear magnetic field response of the magnetoresistance in Ag_0.07–La_0.67Sr_0.13Ag_0.08Ä_0.12MnO₃ composite

Temperature stability and linear magnetic field response of the magnetoresistance in Ag_0.07–La_0.67Sr_0.13Ag_0.08Ä_0.12MnO₃ composite