Magnetic Phase Diagrams of R{sub 1–x}Sr{sub x}(Mn{sub 1–x/2}Sb{sub x/2})O{sub 3} (R = La, Pr, Nd, Sm, Eu) with Trivalent Manganese Ions

Journal Article · Sat Sep 15 04:00:00 EDT 2018 · Physics of the Solid State

DOI:https://doi.org/10.1134/S1063783418090330· OSTI ID:22771029

Bushinskii, M. V.; Tereshko, N. V. ^[1]; Sikolenko, V. ^[2]; Ritter, C. ^[3]; Schorr, S. ^[4]

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1. National Academy of Sciences of Belarus, Scientific and Practical Materials Research Center (Belarus)
2. Joint Institute for Nuclear Research (Russian Federation)
3. Institut Laue–Langevin (France)
4. Helmholtz-Zentrum Berlin (Germany)

The results of neutron-diffraction, magnetic, and magnetotransport studies of La{sub 1‒x}Sr{sub x}(Mn{sub 1-x/2}{sup 3+}Sb{sub x/2}{sup 5+})O{sub 3} (x ≤ 0.7) pervoskites, which contain only Mn{sup 3+} ions, are reported. It is demonstrated that the system undergoes a transition from the antiferromagnetic state to the ferromagnetic one at x ∼ 0.2. Its structure then changes from O′-orthorombic to O-orthorombic, which is attributable to orbital disordering. At x ≥ 0.6, the competition between antiferromagnetic and ferromagnetic interactions and strong diamagnetic dilution trigger the emergence of the cluster spin-glass phase. As the ionic radius of rare-earth ions in R{sub 0.7}Sr{sub 0.3}Mn{sub 0.85}Sb{sub 0.15}O{sub 3} decreases, the ferromagnetic state transforms gradually into spin glass (R = Sm). All ferromagnetic compositions are dielectric in the magnetically ordered phase with strong magnetoresistive effects. It is assumed that ferromagnetism is induced by the strong covalency and orbital disordering.

• OSTI ID: 22771029
• Journal Information: Physics of the Solid State, Journal Name: Physics of the Solid State Journal Issue: 9 Vol. 60; ISSN 1063-7834
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
ANTIMONIDES
DIELECTRIC MATERIALS
EUROPIUM COMPOUNDS
FERROMAGNETISM
LANTHANUM COMPOUNDS
MAGNETIC PROPERTIES
MAGNETORESISTANCE
MANGANESE COMPOUNDS
NEODYMIUM COMPOUNDS
NEUTRON DIFFRACTION
PHASE DIAGRAMS
PRASEODYMIUM COMPOUNDS
SAMARIUM COMPOUNDS
SPIN GLASS STATE
STRONTIUM COMPOUNDS