The low-temperature magnetostructure and magnetic field response of Pr0.9Ca0.1MnO3: the roles of Pr spins and magnetic phase separation

J. Tikkanen; M. Frontzek; W. Hergert; A. Ernst; P. Paturi; Linda Udby

doi:10.1088/0953-8984/28/3/036001

The low-temperature magnetostructure and magnetic field response of Pr_0.9Ca_0.1MnO₃: the roles of Pr spins and magnetic phase separation

J. Tikkanen, M. Frontzek, W. Hergert, A. Ernst, P. Paturi, Linda Udby

X-ray and Neutron Science

8 Citationer (Scopus)

Abstract

With the goal of elucidating the background of photoinduced ferromagnetism phenomena observed in the perovskite structured (Pr,Ca) manganites, the low-temperature magnetostructure of the material Pr0.9Ca0.1MnO3 was revised using cold neutron powder diffraction, SQUID magnetometry and ab initio calculations. Particular emphasis was placed on determining the presence of nanoscale magnetic phase separation. Previously published
results of a canted A-AFM average ground state were reproduced to a good precision both experimentally and theoretically, and complemented by investigating the effects of an applied magnetic field of 2.7 T on the magnetostructure. Explicit evidence of nanoscale magnetic
clusters in the material was obtained based on high-resolution neutron diffractograms. Along with several supporting arguments, we present this finding as a justification for extending the nanoscale magnetic phase separation model of manganites to the material under discussion
despite its very low Ca doping level in the context of the model. In the light of the new data, we also conclude that the low temperature magnetic moment of Pr must be ca. 300% larger than previously thought in this material, close to the high spin value of 2μB per formula unit.

Originalsprog	Dansk
Artikelnummer	036001
Tidsskrift	Journal of Physics: Condensed Matter
Vol/bind	28
Antal sider	10
ISSN	0953-8984
DOI	https://doi.org/10.1088/0953-8984/28/3/036001
Status	Udgivet - 6 jan. 2016

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10.1088/0953-8984/28/3/036001

cm_28_3_036001Forlagets udgivne version, 1,05 MB

Citationsformater

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abstract = "With the goal of elucidating the background of photoinduced ferromagnetism phenomena observed in the perovskite structured (Pr,Ca) manganites, the low-temperature magnetostructure of the material Pr0.9Ca0.1MnO3 was revised using cold neutron powder diffraction, SQUID magnetometry and ab initio calculations. Particular emphasis was placed on determining the presence of nanoscale magnetic phase separation. Previously publishedresults of a canted A-AFM average ground state were reproduced to a good precision both experimentally and theoretically, and complemented by investigating the effects of an applied magnetic field of 2.7 T on the magnetostructure. Explicit evidence of nanoscale magneticclusters in the material was obtained based on high-resolution neutron diffractograms. Along with several supporting arguments, we present this finding as a justification for extending the nanoscale magnetic phase separation model of manganites to the material under discussiondespite its very low Ca doping level in the context of the model. In the light of the new data, we also conclude that the low temperature magnetic moment of Pr must be ca. 300% larger than previously thought in this material, close to the high spin value of 2μB per formula unit.",

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T1 - The low-temperature magnetostructure and magnetic field response of Pr0.9Ca0.1MnO3

T2 - the roles of Pr spins and magnetic phase separation

AU - Tikkanen, J.

AU - Frontzek, M.

AU - Hergert, W.

AU - Ernst, A.

AU - Paturi, P.

AU - Udby, Linda

PY - 2016/1/6

Y1 - 2016/1/6

N2 - With the goal of elucidating the background of photoinduced ferromagnetism phenomena observed in the perovskite structured (Pr,Ca) manganites, the low-temperature magnetostructure of the material Pr0.9Ca0.1MnO3 was revised using cold neutron powder diffraction, SQUID magnetometry and ab initio calculations. Particular emphasis was placed on determining the presence of nanoscale magnetic phase separation. Previously publishedresults of a canted A-AFM average ground state were reproduced to a good precision both experimentally and theoretically, and complemented by investigating the effects of an applied magnetic field of 2.7 T on the magnetostructure. Explicit evidence of nanoscale magneticclusters in the material was obtained based on high-resolution neutron diffractograms. Along with several supporting arguments, we present this finding as a justification for extending the nanoscale magnetic phase separation model of manganites to the material under discussiondespite its very low Ca doping level in the context of the model. In the light of the new data, we also conclude that the low temperature magnetic moment of Pr must be ca. 300% larger than previously thought in this material, close to the high spin value of 2μB per formula unit.

AB - With the goal of elucidating the background of photoinduced ferromagnetism phenomena observed in the perovskite structured (Pr,Ca) manganites, the low-temperature magnetostructure of the material Pr0.9Ca0.1MnO3 was revised using cold neutron powder diffraction, SQUID magnetometry and ab initio calculations. Particular emphasis was placed on determining the presence of nanoscale magnetic phase separation. Previously publishedresults of a canted A-AFM average ground state were reproduced to a good precision both experimentally and theoretically, and complemented by investigating the effects of an applied magnetic field of 2.7 T on the magnetostructure. Explicit evidence of nanoscale magneticclusters in the material was obtained based on high-resolution neutron diffractograms. Along with several supporting arguments, we present this finding as a justification for extending the nanoscale magnetic phase separation model of manganites to the material under discussiondespite its very low Ca doping level in the context of the model. In the light of the new data, we also conclude that the low temperature magnetic moment of Pr must be ca. 300% larger than previously thought in this material, close to the high spin value of 2μB per formula unit.

U2 - 10.1088/0953-8984/28/3/036001

DO - 10.1088/0953-8984/28/3/036001

M3 - Tidsskriftartikel

C2 - 26732100

SN - 0953-8984

VL - 28

JO - Journal of Physics: Condensed Matter

JF - Journal of Physics: Condensed Matter

M1 - 036001

ER -