TY - JOUR
T1 - Ferromagnetic ordering in LaMn1-xO3 manganites
T2 - EMR probing
AU - Shames, A. I.
AU - Auslender, M.
AU - Rozenberg, E.
AU - Gorodetsky, G.
AU - Hébert, S.
AU - Martin, C.
N1 - Funding Information:
This research was supported by the Israeli Science Foundation administered by the Israel Academy of Sciences and Humanities (Grant no. 845/05).
PY - 2007/1/1
Y1 - 2007/1/1
N2 - Electron magnetic resonance (EMR) was employed to study magnetic properties of self-doped LaMn1-xO3 (x=0, 0.02 and 0.06) manganites in interval 120-600 K. Resonance spectra evidence that x=0 and 0.02 samples show antiferromagnetic (AFM) ground state at low temperatures, while x=0.06 one demonstrates ferromagnetic (FM)-like ground state. Spectra of the parent compound reveal some FM entities within the AFM matrix. Self-doping leads to a sharp increase of low-temperature double-integrated intensity of resonance signals pointing out progressive growth of ferromagnetic component. Paramagnetic (PM) state g-factor gradually changes from 1.91±0.01 to 1.98 with increasing x from 0 to 0.06. The results obtained show that vacancies at Mn-sites induce FM state through creation of Mn4+ ions in Mn3+ host and reinforcement of double-exchange (DE) interaction.
AB - Electron magnetic resonance (EMR) was employed to study magnetic properties of self-doped LaMn1-xO3 (x=0, 0.02 and 0.06) manganites in interval 120-600 K. Resonance spectra evidence that x=0 and 0.02 samples show antiferromagnetic (AFM) ground state at low temperatures, while x=0.06 one demonstrates ferromagnetic (FM)-like ground state. Spectra of the parent compound reveal some FM entities within the AFM matrix. Self-doping leads to a sharp increase of low-temperature double-integrated intensity of resonance signals pointing out progressive growth of ferromagnetic component. Paramagnetic (PM) state g-factor gradually changes from 1.91±0.01 to 1.98 with increasing x from 0 to 0.06. The results obtained show that vacancies at Mn-sites induce FM state through creation of Mn4+ ions in Mn3+ host and reinforcement of double-exchange (DE) interaction.
KW - Ferromagnetic and electron paramagnetic resonance
KW - Self-doped CMR manganite
UR - http://www.scopus.com/inward/record.url?scp=34250349928&partnerID=8YFLogxK
U2 - 10.1016/j.jmmm.2007.03.053
DO - 10.1016/j.jmmm.2007.03.053
M3 - Article
AN - SCOPUS:34250349928
VL - 316
SP - e640-e643
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
IS - 2 SPEC. ISS.
ER -