Large magnetoresistance in magnetically frustrated ruthenates

Mamchik, A.; Chen, I.-W.
January 2003
Applied Physics Letters;1/27/2003, Vol. 82 Issue 4, p613
Academic Journal
A large negative magnetoresistance effect is found in Fe-doped ruthenates of perovskite and layered perovskite structures. These new materials are magnetically glassy, and can be derived from a parent compound that is either magnetic or nonmagnetic. The magnetoresistance is nearly linear with the magnetic field up to 9 T and is stronger at lower temperature. Atomic-level spin valves associated with Fe cations on B sites that regulate electron transport in response to an external magnetic field are suggested to be the mechanism responsible.


Related Articles

  • Enhanced magnetoresistance in the complex perovskite LaCu[sub 3]Mn[sub 4]O[sub 12]. Alonso, J.A.; Sanchez-Benitez, J.; De Andres, A.; Martinez-Lope, M.J.; Casais, M.T.; Martinez, J.L. // Applied Physics Letters;9/29/2003, Vol. 83 Issue 13, p2623 

    Moderate-pressure techniques (P=2 GPa) have been used to prepare the complex LaCu[sub 3]Mn[sub 4]O[sub 12] perovskite. It has been characterized by neutron powder diffraction, magnetic, and magnetotransport measurements. This material is ferrimagnetic below T[sub C]=361 K. The magnetoresistance...

  • Tuning colossal magnetoresistance response by Cr substitution in La[sub 0.67]Sr[sub 0.33]MnO[sub 3]. Sun, Young; Tong, Wei; Xu, Xiaojun; Zhang, Yuheng // Applied Physics Letters;1/29/2001, Vol. 78 Issue 5, p643 

    We have studied the effects of Cr substitution in the perovskite La[sub 0.67]Sr[sub 0.33]MnO[sub 3] on the magnetic, electrical transport, and magnetoresistance properties. Cluster glass behaviors have been observed in the La[sub 0.67]Sr[sub 0.33]Mn[sub 1-x]Cr[sub x]O[sub 3] system. The most...

  • Surface electronic phase transition in colossal magnetoresistive manganese perovskites: La[sub 0.65]Sr[sub 0.35]MnO[sub 3]. Dulli, Hani; Plummer, E. W.; Plummer, E.W.; Dowben, P. A.; Dowben, P.A.; Choi, Jaewu; Liou, S.-H. // Applied Physics Letters;7/24/2000, Vol. 77 Issue 4 

    We have observed a distinct surface phase transition for an important class of giant magnetoresistance materials [La[sub 1-x]Sr[sub x]MnO[sub 3](x=0.35)]. The surface phase transition occurs at 240 K compared to 370 K for the bulk and is fundamentally different. In the bulk, a ferromagnetic...

  • Magnetoresistance Effect in A[sub 2](FeMo)O[sub x] Double Perovskites (A = Sr, Ca; 5.90=x=6.05). Lobanovskii, L. S.; Troyanchuk, I. O.; Pushkarev, N. V.; Szymczak, G. // Physics of the Solid State;Apr2001, Vol. 43 Issue 4, p677 

    The dependences of magnetic, electric, and magnetotransport properties on oxygen non stoichiometry were investigated in compounds of Ca[sub 2](FeMo)O[sub x] and Sr[sub 2](FeMo)O[sub X] (5.90 = x = 6.05). The regular trends in behavior of the magnetization, resistance, and magnetoresistance of...

  • Magnetic properties and giant magnetoresistance in La[sub 0.67]Ca[sub 0.33]MnO[sub x] bulk material. Zhang, X.X.; Yu, R.H. // Applied Physics Letters;5/27/1996, Vol. 68 Issue 22, p3191 

    Examines the magnetic and transport properties of a perovskite-type crystal sample with a nominal composition La[sub 0.67]Ca[sub o.33]MnO[sub x]. Temperature range and magnetic field limitation; Exhibition of magnetization data obtained in the zero-field-cooled process; Appearance of an...

  • Colossal magnetoresistance of the Sm[sub 1-x]Sr[sub x]MnO[sub 3] system. Dunaevskiı, S. M.; Malyshev, A. L; Trunov, V. A.; Popov, V. V. // Physics of the Solid State;Oct97, Vol. 39 Issue 10, p1636 

    The results of investigating the temperature dependence of the resistivity, the differential magnetic susceptibility, and the magnetoresistance of a partially substituted perovskite Sm[sub 1 - x]Sr[sub x]MnO[sub 3] (x = 0.16-0.4) are presented. Colossal intrinsic magnetoresistance, reaching 90%...

  • Role of the oxygen subsystem in the double-exchange mechanism. Dunaevskiı, S. M. // Physics of the Solid State;Oct98, Vol. 40 Issue 10, p1687 

    The paper is an attempt at unraveling the role of p-d hybridization in perovskites exhibiting giant magnetoresistance by performing a semiclassical calculation of single-particle eigenenergies of electrons in the triatomic system Mn-O-Mn for arbitrarily oriented manganeseion magnetic moments. It...

  • The Effect of Colossal Magnetoresistance in SmCu[sub 3]Mn[sub 4]O[sub 12] Perovskite-Like Oxide. Lobanovsky, L. S.; Troyanchuk, I. O. // Journal of Experimental & Theoretical Physics;Feb2003, Vol. 96 Issue 2, p331 

    The magnetoresistance effect in the SmCu[sub 3]Mn[sub 4]O[sub 12] compound with a perovskite-like structure is investigated for the first time. It is found that an intragranular magnetoresistance effect shows up in SmCu[sub 3]Mn[sub 4]O[sub 12] in the vicinity of the magnetic ordering...

  • Abnormal lattice effect on magnetic/transport phase diagram in La[sub 0.7-x]Lu[sub x]Sr[sub 0.3]MnO[sub 3] perovskites. Huang, Yun-Hui; Luo, Feng; Li, Yong; Wang, Zhe-Ming; Liao, Chun-Sheng; Yan, Chun-Hua // Journal of Applied Physics;6/15/2002, Vol. 91 Issue 12, p10218 

    An anomalous dependence of the average ion radius 〈r[sub A]〉 on Curie temperature (T[sub C]) and metal-insulator (M-I) transition is obtained in La[sub 0.7-x]Lu[sub x]Sr[sub 0.3]MnO[sub 3] compared with the phenomenon observed by Hwang et al. [Phys. Rev. Lett. 75, 914 (1995)]....


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics