Pressure effect on the magnetic phase diagram of La1.4Sr1.6Mn2O7

K V Kamenev, M R Lees, G Balakrishnan, D M K Paul, G J Mcintyre, Z Arnold

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Magnetic pressure-temperature phase diagram of La1.4Sr1.6Mn2O7 layered manganite has been studied using magnetization measurements and neutron diffraction an single crystals. It has been found that La1.4Sr1.6Mn2O7 is a quasi two-dimensional ferromagnet at temperatures as high as 340 K. At lower temperatures it undergoes a series of phase transitions into magnetic phases with three-dimensional long-range order. At 90 K La1.4Sr1.6Mn2O7 becomes an antiferromagnet and at 65 K it undergoes a transition into a ferromagnetic phase. It has also been shown that applied pressure enhances the long-range antiferromagnetic correlations between Mn2O9 bilayers. These findings have been explained in terms of numerical calculations, taking into account pressure-induced electron transfer between 3d orbitals of the Mn ions.

Original languageEnglish
Title of host publicationFRONTIERS OF HIGH PRESSURE RESEARCH II: APPLICATION OF HIGH PRESSURE TO LOW-DIMENSIONAL NOVEL ELECTRONIC MATERIALS
EditorsHD Hochheimer, B Kuchta, PK Dorhout, JL Yarger
Place of PublicationDORDRECHT
PublisherSpringer
Pages451-461
Number of pages11
ISBN (Print)1-4020-0159-2
Publication statusPublished - 2001
EventConference of the NATO Advanced Research Workshop on Frontiers of High Pressure Reseach II - Application of High Pressure to Low-Dimensional Novel Electronic Materials - PRINGREE PK
Duration: 10 Jun 200115 Jun 2001

Conference

ConferenceConference of the NATO Advanced Research Workshop on Frontiers of High Pressure Reseach II - Application of High Pressure to Low-Dimensional Novel Electronic Materials
CityPRINGREE PK
Period10/06/0115/06/01

Keywords

  • magnetism
  • high pressure
  • layered manganites
  • colossal magnetoresistance
  • LAYERED PEROVSKITE STRUCTURE
  • MANGANITE LA2-2XSR1+2XMN2O7
  • MAGNETORESISTANCE
  • CRYSTAL

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