Modeling an oblique anhysteretic remanent magnetization using low-temperature and alternating-field demagnetizations.

无滞后剩磁(ARM)通常是在与交变磁场(AF)平行的直流磁场中产生的，即“平行的ARM”。在这项研究中，我们实验研究了在直流电场倾斜或垂直于AF的情况下产生的斜臂(OARM)。我们模拟了它的获取机制，并建议将其应用于古地磁研究。(1)平行、垂直和倾斜电磁场的装置OARM的两轴直流场正交性优于0.5°，直流场强与电流的线性关系得到了很高的精度。(2)在10-100微T的范围内，用外加的直流场线性地测量了OARMOARM的强度。强度：平行臂和GT；斜臂和GT；垂直ARM附加定律：OARM(AF；DC1，DC2；HC1，HC2)=OARM(AF；DC1，0；HC1，HC2)+OARM(AF；0，DC2；Hc1，hc2)Dc1：线圈-1的DC场，DC2：线圈-2的DC场，低温退磁(LTD)：LTD分量(多域粒子起源)显示出与外加直流磁场平行的方向。LT Memory(单结和伪单结粒子起源)没有表现出平行的方向。(3)OARM采集建模建议，OARM的观测特性可以用SD粒子的形状各向异性模型和MD粒子的磁畴壁模型来解释。(4)OARM的应用认为OARM具有评估SD的潜力，PSD和MD组分。OARM可用于LTD-DHT Shaw方法的绝对古强度测定。

Anhysteretic remanent magnetization(ARM) is normally imparted applying a dc field parallel to alternating field(AF), that is ‘parallel ARM'. In this study we have experimentally investigated oblique ARM(OARM) which is given under the condition of a dc field oblique to or perpendicular to AF. We have modeled its acquisition mechanism and suggest its application to the paleomagnetic study. The results obtained in this study will be summarized as follows.(1)Device for parallel, perpendicular and oblique ARMsOrthogonality of two-axis dc fields for OARM is better than 0.5 deg.Linearity of dc field intensity vs. current is confirmed with very high precision.(2)Measurement of bulk OARMOARM intensity is linearly acquired with applied dc fields in range of 10-100 micro T.Intensity :Parallel ARM>Oblique ARM>Perpendicular ARMAddivity law of OARM :OARM(AF;DC1,DC2;Hc1,Hc2)=OARM(AF;DC1,0;Hc1,Hc2)+OARM(AF;0,DC2;Hc1,Hc2) DC1:Dc field by Coil-1,DC2:Dc field by Coil-2,He:coercivity forceUni-axis AF demagnetization curve is almost the reverse of ARM acquisition curve.Low temperature demagnetization(LTD) :LTD components (multi-domain particle origin) show a direction parallel to the applied dc field.LT memory (single-and pseudo-single-domain particle origin) does not show a parallel direction.(3)Modeling OARM acquisitionIt is suggested that the observed characteristics of OARM can be explained with the shape-anisotropy model of SD particles and the domain-wall model of MD particles.(4)Application of OARMIt is thought that OARM has a potential for evaluation of SD, PSD and MD components.OARM can be used in the LTD-DHT Shaw method in the absolute paleointensity determination.