title: Weak itinerant antiferromagnetism in PuIn3 explored using 115In nuclear quadrupole resonance.
abstract: The results of (115)In nuclear quadrupole resonance (NQR) measurements on PuIn3 are reported. Three of the four NQR lines of (115)In expected for nuclear spin I = 9/2 are observed. The equal spacing of these lines at 20 K yields the NQR frequency of νQ = 10.45 MHz, and the asymmetry parameter of the electric field gradient η = 0. The NQR line profile and the nuclear spin-lattice relaxation rate 1/T1 display an abrupt change at 14 K, which is associated with the onset of long-range antiferromagnetic order. The temperature dependences of the staggered magnetization MQ(T), extracted from the NQR spectra, and 1/T1 below TN = 14 K are well explained by the self-consistent renormalization (SCR) theory for spin fluctuations. In addition, the scaling between T1T and MQ(T)/MQ(0) is also consistent with the predictions of SCR theory, providing further evidence that PuIn3 is a weak itinerant antiferromagnet in which spin fluctuations around the antiferromagnetic wavevector play a major role in the system's behavior at finite temperatures.
authors: Los Alamos National Laboratory, Los Alamos, NM 87545, USA. Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan.
authors: H
authors: H
authors: Chudo
authors: G
authors: G
authors: Koutroulakis
authors: H
authors: H
authors: Yasuoka
authors: E D
authors: ED
authors: Bauer
authors: P H
authors: PH
authors: Tobash
authors: J N
authors: JN
authors: Mitchell
authors: J D
authors: JD
authors: Thompson