TY - JOUR
T1 - Lattice variation, reentrant electric properties, and magnetic order in bilayered La1.02Sr1.98Mn2O7
AU - Li, W. H.
AU - Wu, S. Y.
AU - Kuo, C. M.
AU - Lee, K. C.
AU - Yang, H. D.
N1 - Funding Information:
We thank the support of the National Institute of Standards and Technology, US Department of Commerce, in providing the neutron facilities used in this work, and the assistance from Dr J.W. Lynn of NIST during the course of experiments. The work was supported by the National Science Council of the ROC under Grant no. NSC 89-2112-M-008-032 (NCU).
PY - 2000/9/29
Y1 - 2000/9/29
N2 - Neutron diffraction, dc electric resistivity, and ac magnetic susceptibility measurements were performed to study the structural, electric, and magnetic properties of naturally bilayered La1.02Sr1.98Mn2O7. An insulator to metal transition was clearly seen at approximately 170 K. Below 60 K, the system reentered the insulating state. Three-dimensional (3D) long-range order of the Mn spins was found, with an ordering temperature of Tm≈180 K and a saturated moment of 〈μz〉 = 2.70(2)μB. The in-plane couplings were ferromagnetic. Within each bilayer, simple antiferromagnetic couplings between the ferromagnetic sheets were found, whereas the neighboring bilayers were coupled ferromagnetically. A structural change that results in a reduction of the thermal contraction rate occurs at approximately 250 K as well.
AB - Neutron diffraction, dc electric resistivity, and ac magnetic susceptibility measurements were performed to study the structural, electric, and magnetic properties of naturally bilayered La1.02Sr1.98Mn2O7. An insulator to metal transition was clearly seen at approximately 170 K. Below 60 K, the system reentered the insulating state. Three-dimensional (3D) long-range order of the Mn spins was found, with an ordering temperature of Tm≈180 K and a saturated moment of 〈μz〉 = 2.70(2)μB. The in-plane couplings were ferromagnetic. Within each bilayer, simple antiferromagnetic couplings between the ferromagnetic sheets were found, whereas the neighboring bilayers were coupled ferromagnetically. A structural change that results in a reduction of the thermal contraction rate occurs at approximately 250 K as well.
UR - http://www.scopus.com/inward/record.url?scp=0034271092&partnerID=8YFLogxK
U2 - 10.1016/S0921-5107(00)00500-6
DO - 10.1016/S0921-5107(00)00500-6
M3 - 期刊論文
AN - SCOPUS:0034271092
SN - 0921-5107
VL - 77
SP - 274
EP - 279
JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
IS - 3
ER -