Size Effect's Influence on the Magnetic Phase Transitions in the Nanosized Magnets

被引：4

作者：

Afremov, L. L. ^{[1
]}

Kirienko, Yu. V. ^{[2
]}

Petrov, A. A. ^{[1
]}

Chepak, A. K. ^{[1
]}

机构：

[1] Far Eastern Fed Univ, Vladivostok, Russia

[2] European XFEL GmbH, Holzkoppel 4, D-22869 Schenefeld, Germany

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2023年 / 36卷 / 02期

关键词：

Magnetic phase transition; Nanoparticles; Ultrathin magnetic films; Random interaction field; Critical concentration; Nanosized magnets; EFFECTIVE CRITICAL EXPONENTS; CRITICAL-BEHAVIOR; ISING-MODEL; DIMENSIONAL CROSSOVER; CURIE-TEMPERATURE; FILMS; DEPENDENCE; DIAGRAMS;

D O I：

10.1007/s10948-022-06482-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present a simple approach (the mean spin method) to investigate the influence of the size of nanoparticles (thickness of ultrathin films) and the concentration of << magnetic atoms >> on the critical temperature and magnetic susceptibility in the magnetic phase transition region. The critical spin-spin correlation indices for nanosized magnets are calculated using the scaling relation. It is shown that the critical concentration pC of the transition from an ordered to an unordered state increases as the characteristic size of nanoparticles (thickness of ultrathin films) decreases. The results obtained by the mean spin method are in qualitative agreement with the Monte Carlo simulation and experimental data.

引用

页码：587 / 600

页数：14

共 74 条

[1] Thermodynamic measurements of magnetic ordering in antiferromagnetic superlattices
Abarra, EN
Takano, K
Hellman, F
Berkowitz, AE
[J]. PHYSICAL REVIEW LETTERS, 1996, 77 (16) : 3451 - 3454
[2] AFREMOV LL, 1988, IZV AN SSSR FIZ ZEM+, P101
[3] CRITICAL TEMPERATURES OF ISING LATTICE FILMS
ALLAN, GAT
[J]. PHYSICAL REVIEW B, 1970, 1 (01): : 352 - &
[4] Finite-size effects and uncompensated magnetization in thin antiferromagnetic CoO layers
Ambrose, T
Chien, CL
[J]. PHYSICAL REVIEW LETTERS, 1996, 76 (10) : 1743 - 1746
[5] Finite-size scaling in thin antiferromagnetic CoO layers
Ambrose, T
Chien, CL
[J]. JOURNAL OF APPLIED PHYSICS, 1996, 79 (08) : 5920 - 5922
[6] Magnetic Properties of Rare Earth Doped SnO2, TiO2 and CeO2 Nanoparticles
Apostolov, Angel T.
Apostolova, Iliana N.
Wesselinowa, Julia M.
[J]. PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 2018, 255 (08):
[7] MAGNETIC PHASE-TRANSITION IN A 2-DIMENSIONAL SYSTEM - P(1X1)-NI ON CU(111)
BALLENTINE, CA
FINK, RL
ARAYAPOCHET, J
ERSKINE, JL
[J]. PHYSICAL REVIEW B, 1990, 41 (04) : 2631 - 2634
[8] EXPLORING MAGNETIC-PROPERTIES OF ULTRATHIN EPITAXIAL MAGNETIC-STRUCTURES USING MAGNETO-OPTICAL TECHNIQUES
BALLENTINE, CA
FINK, RL
ARAYAPOCHET, J
ERSKINE, JL
[J]. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1989, 49 (05): : 459 - 466
[9] Random interaction fields method: Magnetic phase transitions in the thin films
Belokon, V.
Dyachenko, O.
[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2015, 374 : 92 - 95
[10] Belokon V., 2006, SOLID STATE PHYS, V48

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