Influence of Electron Doping on Magnetic Order in CeRu₂Al₁₀

Journal Article · Wed Sep 17 00:00:00 EDT 2014 · Journal of the Physical Society of Japan

DOI:https://doi.org/10.7566/JPSJ.83.104707· OSTI ID:1159438

Kobayashi, Riki ^[1]; Kaneko, Koji ^[1]; Saito, Kotaro ^[2]; Mignot, Jean-Michel ^[3]; André, Gilles ^[3]; Robert, Julien ^[3]; Wakimoto, Shuichi ^[1]; Matsuda, Masaaki ^[4]; Chi, Songxue ^[4]; Haga, Yoshinori ^[5]; Matsuda, Tatsuma D. ^[5]; Yamamoto, Etsuji ^[5]; Nishioka, Takashi ^[6]; Matsumura, Masahiro ^[6]; Tanida, Hiroshi ^[7]; Sera, Masafumi ^[7]

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1. Japan Atomic Energy Agency (JAEA), Tokai (Japan)
2. Alternative Energies and Atomic Energy Commission (CEA), Saclay (France). Laboratoire Leon Brillouin; Tohoku Univ., Sendai (Japan). Dept. of Physics
3. Alternative Energies and Atomic Energy Commission (CEA), Saclay (France). Laboratoire Leon Brillouin
4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
5. Japan Atomic Energy Agency (JAEA), Tokai (Japan). Advanced Science Research Center
6. Kochi University, Kochi (Japan). Graduate School of Integrated Arts and Sciences
7. Hiroshima Univ., Higashi-Hiroshima (Japan). Department of Quantum Matter

The effect of electron doping by the substitution of Rh for Ru on unconventional magnetic order in CeRu₂Al₁₀ was investigated via neutron powder diffraction. In Ce(Ru_1-xRh_x)₂Al₁₀ with x = 0.05, 0.12, and 0.2, reorientation of the ordered moment from the c- to the a-axis takes place in all samples, while the ordering vector q=(0 1 0) remains unchanged within this concentration range. The moment reorientation is accompanied by an enhancement in its size by a factor of ~2.4, from μ=0.43 μ_B at x=0 to μ =1.06, 1.04, and 1.02 μ_B for x=0.05, 0.12 and 0.2, respectively. The continuous decrease in N´eel temperature T₀(T_N), despite an abrupt increase in μ , underlines the strong anisotropy in the exchange interaction in CeRu₂Al₁₀, and the fact that this anisotropy is easily suppressed by electron doping.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: AC05-00OR22725
• OSTI ID: 1159438
• Journal Information: Journal of the Physical Society of Japan, Vol. 83, Issue 10; ISSN 0031-9015
• Publisher: Physical Society of Japan
• Country of Publication: United States
• Language: English

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36 MATERIALS SCIENCE