Influence of pressure on structural and magnetic phase transitions in La{sub 0.835}Sr{sub 0.165}MnO{sub 3}

Journal Article · Fri Aug 01 04:00:00 EDT 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.56.2285· OSTI ID:528058

Kamenev, K; Balakrishnan, G; Lees, M R; Paul, D M ^[1]; Arnold, Z; Mikulina, O ^[2]

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1. Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom)
2. Institute of Physics, Academy of Sciences of Czech Republic, Cukrovarnicka 10, 162 00 Prague 6 (Czech Republic)

Measurements of the thermal expansion of a single crystal of La{sub 0.835}Sr{sub 0.165}MnO{sub 3} were performed under hydrostatic pressure of up to 9 kbar. The P-T phase diagram is established for the structural and magnetic phase transitions. Pressure is found to enhance the ferromagnetic coupling and to weaken the stability of the low-temperature orthorhombic phase by reducing the bending of the Mn-O-Mn bond. The decrease in the temperature T{sub S} of the structural phase transition and the increase in the Curie temperature with increasing pressure leads to the two phase boundaries crossing at a pressure of about 3 kbar. The peculiar behavior of the T{sub S} and T{sub C} in the vicinity of the crossing point demonstrates a strong coupling between structural distortion and magnetic ordering in the La{sub 0.835}Sr{sub 0.165}MnO{sub 3} compound. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 528058
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 5 Vol. 56; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
CURIE POINT
FERROMAGNETIC MATERIALS
LANTHANUM OXIDES
MAGNETIC PROPERTIES
MANGANESE OXIDES
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
STRONTIUM OXIDES
THERMAL EXPANSION