000044962 001__ 44962
000044962 005__ 20210121114515.0
000044962 0247_ $$2doi$$a10.1103/PhysRevB.91.134425
000044962 0248_ $$2sideral$$a93299
000044962 037__ $$aART-2015-93299
000044962 041__ $$aeng
000044962 100__ $$aAdroja, D.T.
000044962 245__ $$aMuon spin rotation and neutron scattering study of the noncentrosymmetric tetragonal compound CeAuAl3
000044962 260__ $$c2015
000044962 5060_ $$aAccess copy available to the general public$$fUnrestricted
000044962 5203_ $$aWe have investigated the noncentrosymmetric tetragonal heavy fermion compound CeAuAl3 using muon spin rotation (µSR), neutron diffraction (ND), and inelastic neutron scattering (INS) measurements. We have also revisited the magnetic, transport, and thermal properties. The magnetic susceptibility reveals an antiferromagnetic transition at 1.1 K with, possibly, another magnetic transition near 0.18 K. The heat capacity shows a sharp ¿-type anomaly at 1.1 K in zero field, which broadens and moves to a higher temperature in an applied magnetic field. Our zero-field µSR and ND measurements confirm the existence of a long-range magnetic ground state below 1.2 K. Further, the ND study reveals an incommensurate magnetic order with a magnetic propagation vector k=(0, 0, 0.52(1)) and a spiral structure of Ce moments coupled ferromagnetically within the ab plane. Our INS study reveals the presence of two well-defined crystal electric field (CEF) excitations at 5.1 and 24.6 meV in the paramagnetic phase of CeAuAl3 that can be explained on the basis of the CEF theory and the Kramer''s theorem for a Ce ion having a 4f1 electronic state. Furthermore, low energy quasielastic excitations show a Gaussian line shape below 30 K compared to a Lorentzian line shape above 30 K, indicating a slowdown of spin fluctuations below 30 K. We have estimated a Kondo temperature of TK=3.5K from the quasielastic linewidth, which is in good agreement with that estimated from the heat capacity. This study also indicates the absence of any CEF-phonon coupling unlike that observed in isostructural CeCuAl3 The CEF parameters, energy level scheme, and their wave functions obtained from the analysis of INS data explain satisfactorily the single crystal susceptibility in the presence of two-ion anisotropic exchange interaction in CeAuAl3.
000044962 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E81$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2009-10040$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2012-30763
000044962 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000044962 590__ $$a3.718$$b2015
000044962 591__ $$aPHYSICS, CONDENSED MATTER$$b16 / 67 = 0.239$$c2015$$dQ1$$eT1
000044962 592__ $$a2.377$$b2015
000044962 593__ $$aElectronic, Optical and Magnetic Materials$$c2015$$dQ1
000044962 593__ $$aCondensed Matter Physics$$c2015$$dQ1
000044962 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000044962 700__ $$0(orcid)0000-0001-6117-9858$$aDe la Fuente, C.$$uUniversidad de Zaragoza
000044962 700__ $$aFraile, A.
000044962 700__ $$aHillier, A.D.
000044962 700__ $$aDaoud-Aladine, A.
000044962 700__ $$aKockelmann, W.
000044962 700__ $$aTaylor, J.W.
000044962 700__ $$aKoza, M.M.
000044962 700__ $$aBurzurí, E.
000044962 700__ $$0(orcid)0000-0001-6284-0521$$aLuis, F.$$uUniversidad de Zaragoza
000044962 700__ $$0(orcid)0000-0002-2624-6004$$aArnaudas, J.I.$$uUniversidad de Zaragoza
000044962 700__ $$aDel Moral, A.
000044962 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000044962 773__ $$g91, 13 (2015), 134425 [12 p.]$$pPhys. Rev. B, Condens. matter mater. phys.$$tPhysical Review B$$x1098-0121
000044962 8564_ $$s2121157$$uhttps://zaguan.unizar.es/record/44962/files/texto_completo.pdf$$yVersión publicada
000044962 8564_ $$s130224$$uhttps://zaguan.unizar.es/record/44962/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000044962 909CO $$ooai:zaguan.unizar.es:44962$$particulos$$pdriver
000044962 951__ $$a2021-01-21-10:59:23
000044962 980__ $$aARTICLE