Critical behavior in Ti-doped manganites LaMn1−xTixO3 (0.05⩽x⩽0.2)

Applied Physics Letters - Tập 91 Số 14 - 2007
Jie Yang1,2, Y. P. Lee1,2
1Hanyang University Quantum Photonic Science Research Center, , Seoul 133-791, Korea and Department of Physics, , Seoul 133-791, Korea
2Quantum Photonic Science Research Center, Hanyang University, Seoul 133-791, Korea and Department of Physics, Hanyang University, Seoul 133-791, Korea

Tóm tắt

The critical properties of the ferromagnetic insulating system LaMn1−xTixO3 (0.05⩽x⩽0.2) are investigated based on the static magnetization measurements around Curie temperature TC. The values of critical exponents, derived from the magnetic data using the Kouvel-Fisher method, yield 0.359⩽β⩽0.378, 1.24⩽γ⩽1.29, and 4.11⩽δ⩽4.21 with a TC of 95–173K. The exponent values are close to those expected for three-dimensional Heisenberg ferromagnets with short-range interactions, and the magnetic transition is understood in the context of Griffiths phase, arising from the random-temperature effects.

Từ khóa


Tài liệu tham khảo

1999, Adv. Phys., 48, 167, 10.1080/000187399243455

1961, Phys. Rev., 124, 373, 10.1103/PhysRev.124.373

1997, Phys. Rev. B, 55, 11072, 10.1103/PhysRevB.55.11072

2000, Phys. Rev. B, 62, 8608, 10.1103/PhysRevB.62.8608

2002, Phys. Rev. B, 65, 104420, 10.1103/PhysRevB.65.104420

2003, J. Magn. Magn. Mater., 260, 361, 10.1016/S0304-8853(02)01341-0

2005, Solid State Commun., 136, 268, 10.1016/j.ssc.2005.08.005

1993, J. Solid State Chem., 104, 74, 10.1006/jssc.1993.1142

1971, Introduction to Phase Transitions and Critical Phenomena, 200

1967, Phys. Rev. Lett., 19, 786, 10.1103/PhysRevLett.19.786

1987, Statistical Mechanics, 2nd ed., 432

1964, Phys. Rev., 136, A1626, 10.1103/PhysRev.136.A1626

1998, Phys. Rev. Lett., 81, 4740, 10.1103/PhysRevLett.81.4740

1999, Phys. Rev. B, 59, 1129, 10.1103/PhysRevB.59.1129

2003, Phys. Rev. B, 68, 132404, 10.1103/PhysRevB.68.132404

2007, Phys. Rev. B, 75, 024419, 10.1103/PhysRevB.75.024419

1972, Phys. Rev. Lett., 29, 917, 10.1103/PhysRevLett.29.917

2002, Phys. Rev. Lett., 89, 227202, 10.1103/PhysRevLett.89.227202

2007, Phys. Rev. B, 76, 054442, 10.1103/PhysRevB.76.054442

1999, Phys. Rev. B, 60, 2998, 10.1103/PhysRevB.60.2998

1969, Phys. Rev. Lett., 23, 17, 10.1103/PhysRevLett.23.17

2002, Phys. Rev. Lett., 88, 197203, 10.1103/PhysRevLett.88.197203

1983, Phys. Rev. B, 27, 413, 10.1103/PhysRevB.27.413

2004, Phys. Rev. B, 70, 104417, 10.1103/PhysRevB.70.104417

Thông tin
Thông tin xuất bản

Applied Physics Letters

Tập 91 Số 14

Thông tin tác giả