RKKY相互作用(RKKYそうごさよう)とは、金属中の伝導電子のスピンを介して行われる局在スピン同士の相互作用である。 この相互作用を導出した4人の物理学者(M.A. The RKKY interaction was originally proposed by Malvin Ruderman and Charles Kittel of the University of California, Berkeley [1] , as a means of explaining unusually broad nuclear spin resonance lines … = spin-glass are disorder and frustration. Edwards-Anderson (Spin Glass) Order Parameter The spin glass transition is from the paramagnetic state with q=0 to a spin glass state with nonzero q as the temperature is decreased. Kasuya、K. N Ruderman、C. c ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. + Ruderman and C. Kittel, Phys. {\displaystyle {R}} Strictly speaking, an ideal spin glass is a collection of randomly distributed isolated moments frozen in random orientations as a result of the RKKY interactions between them. {\displaystyle \sigma '} {\displaystyle \varepsilon _{\rm {F}}} Theor. 16, 45 (1956), https://ja.wikipedia.org/w/index.php?title=RKKY相互作用&oldid=70073435. {\displaystyle k_{\rm {F}}} と σ Phys. Spin-Glass Freezing and RKKY Interactions near the Metal-Insulator Transition in Amorphous Gd-Si Alloys F. Hellman, D.R. 2 だけ離れた局在スピン In MFT there’s a transition in a field for an Ising spin glass the de Almeida Thouless (AT) line from a spin glass phase (divergent relaxation times, “replica symmetry breaking”) to a paramagnetic phase Queen, R.M. The RKKY interaction is the J/t >> 1 limit of the double exchange interaction. {\displaystyle N_{e}} の間に働く、RKKY相互作用は次のように書かれる。, ここに、 Yoshida)の頭文字から、RKKY相互作用と命名された。 Kasuya、K. :フェルミ波数である。, 希土類化合物の磁性や、遷移金属化合物のスピングラスなどを議論するうえで重要である。. S In practice this picture is only approximately realised in very dilute alloys having spin freezing temperatures in the accessible temperature range. :伝導電子の数、 {\displaystyle c_{k,\sigma }} σ x 、 序変数(spin-glass order parameter)とよばれる。自己平均性を利用すると、Jij についての平均はサイト に関して平均することと同じとみなせる。したがって、スピングラス秩序変数を次のように書くこともで きる。q = [ Si 2] av (16.9) :フェルミエネルギー、 Yoshida)の頭文字から、RKKY相互作用と命名された。, はじめ、ルーダーマンとチャールズ・キッテルは、金属中の伝導電子と核スピンの相互作用を研究した[1]。糟谷忠雄はこれを希土類金属の磁性に適用した議論を行い[2]、芳田奎はこれを伝導電子と局在スピンに置き換えて論じた(s-dまたはs-f交換相互作用)[3]。, ここに、 Journal of Magnetism and Magnetic Materials 9 (1978) 46-49 North-Holland Publishing Company PROPERTIES OF THE ISING SPIN GLASS WITH RKKY INTERACTION A.FREUDENHAMMER Gesamthochschule Duisburg Fachbereich lo, Laboratorium for Festkperphysik D-4100 Duisburg, Fed. We use cookies to help provide and enhance our service and tailor content and ads. of this classical behavior is that the coupling between spin and charge uctuations is rather weak; whether the frozen spins in the spin glass phase are in a metallic, or a insulating, host is not of direct importance in theories of the formation of the spin glass phase, or of its critical uctuations. Copyright © 2020 Elsevier B.V. or its licensors or contributors. ⁡ 4 {\displaystyle f(x)={\frac {-x\cos x+\sin x}{x^{4}}}} † , k スピングラス模型の臨界点と双対変換1 – 厳密解を求めて– 京都大学 大学院情報学研究科 システム科学専攻,大関 真之2 (2010 年5 月17 日受理) 本解説記事では,有限次元のスピングラス模型に対する新たな解析手法を紹介する.新たな ( R x {\displaystyle \sigma } Absence of size dependence in the spin-glass resistivity of AuFe wires? Local spins are expected to produ… G. Neuttiens, J. Eom, C. Strunk et al. x By continuing you agree to the use of cookies. M.A. Copyright © 1986 Published by Elsevier B.V. Journal of Magnetism and Magnetic Materials, https://doi.org/10.1016/0304-8853(86)90523-8. Rep. Germany Received 28 March 1978 Specific heat and susceptibility of an Ising spin glass system are … k The canon-ical representatives of spin-glasses, magnetic alloys, have an oscillating long-range Ruderman-Kittel-Kasuya-Yosida (RKKY) spin-spin interaction3. These are classified into two groups: the one is expressed by a stable distribution and the other by the superposition of two types of distributions. )の伝導電子の生成(消滅)演算子を表す。s-d相互作用により局在スピン間には、伝導電子のスピン分極が、距離の3乗で減衰し、振動しながらはたらく(RKKY相互作用)。, 距離 T. Kasuya, Prog. The RKKY interaction is generalized to arbitrary dimensions d and to include damping in impure or amorphous systems. ′ x Local spins are expected to produce spin glass effects, such as freezing after the Vogel-Fulcher law. ε Rev. f The main points of a numerical simulation study of the spin glass transition in Ruderman-Kittel-Kasuya-Yosida (RKKY) systems are summarized. − ( 1 {\displaystyle {\mathbf {S} }_{1}} sin e F Potok, and B.L. はそれぞれ、伝導電子のスピン、(d電子またはf電子の)局在スピンをあらわす。 RKKY相互作用(RKKYそうごさよう)とは、金属中の伝導電子のスピンを介して行われる局在スピン同士の相互作用である。この相互作用を導出した4人の物理学者(M.A. S G is the large spin representing the spin-glass bulk, whereas s 1 and s 2 are the interfacial spins. x The stan-dard Edwards-Anderson model4 has quenched random … {\displaystyle {\boldsymbol {\sigma }}} Distributions of hyperfine magnetic fields were obtained for RKKY spin glass systems such as CuMn:Sn, AgMn:Sn, AuCr:Sn, AuMn:Sn and AuFe:Sn, together with some ternary alloys. 、 Kittel、T. ⁡ σ ) ) は波数 k'(k)、スピン , Ruderman、C. σ 96, 99 (1954). The dependence on concentration, resistivity, and dimensionality is estimated. A brief review of numerical simulation studies of T ∼ 0 K properties of Ruderman-Mttel-Kasuya-Yosida (RKKY) spin glasses is presented, followed by a presentation of new Monte Carlo data which reveal that the actual spin-glass transition in a classical model occurs at a rather lower temperature than previously thought. ′ {\displaystyle {\mathbf {S} }_{2}} Kittel、T. does not have any quenched disorderUse Effect of pressure on the amorphous spin glass (LaGd)Au F Razavi and J S Schilling Charge localization due to RKKY interaction in the spin-glass AuFe View the table of contents for this issue, or go to the journal homepage for more

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