Mossbauer and Magnetic Studies of Doped Lanthanum Manganite La1-xCaxMn0.98Fe0.02O3 (x=0.05, 0.10, 0.20): II. Stoichiometric Composition and Phase Segregation

被引：2

作者：

Pchelina, D. I. ^{[1
]}

Medvetskaya, I. Yu. ^{[1
]}

Chistyakova, N. I. ^{[1
]}

Rusakov, V. S. ^{[1
]}

Sedykh, V. D. ^{[2
]}

Alekhina, Yu. A. ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Moscow 119991, Russia

[2] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Moscow Oblast, Russia

来源：

JOURNAL OF SURFACE INVESTIGATION | 2019年 / 13卷 / 03期

关键词：

doped lanthanum manganites; phase segregation; Mossbauer spectroscopy; magnetic properties; superparamagnetism; COLOSSAL MAGNETORESISTANCE; TRANSITION; SPECTRA; ORDER;

D O I：

10.1134/S1027451019030303

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Phase segregation in calcium-doped lanthanum manganite of stoichiometric composition La1-xCaxMn0.98Fe0.02O3 (x = 0.05, 0.10, 0.20) is studied in a wide temperature range by Mossbauer spectroscopy, X-ray diffraction analysis, and magnetic methods. Structural phase segregation is the coexistence of three rhombic phases, I, II, and II*, described by the same space group Pnma and characterized by different types of magnetic ordering at low temperatures. Phase I transitions to the ferromagnetic state as the temperature decreases, and phases II and II* become antiferromagnetic. At 80 K, stoichiometric samples demonstrate a relaxation behavior which can be due to the presence of small-sized magnetic clusters. The relative content of the ferromagnetic phase increases with increasing Ca content, and the temperature of its magnetic transition grows.

引用

页码：462 / 468

页数：7

共 20 条

[1] Magnetic-field-driven structural transition in a La0.8Ba0.2MnO3 single crystal [J].

Arkhipov, VE ;

Bebenin, NG ;

Dyakina, VP ;

Gaviko, VS ;

Korolev, AV ;

Mashkautsan, VV ;

Neifeld, EA ;

Zainullina, RI ;

Mukovskii, YM ;

Shulyatev, DA .

PHYSICAL REVIEW B, 2000, 61 (17) :11229-11231

[2] Non-conventional magnetic order in Fe-substituted La0.7Sr0.3MnO3 giant-magnetoresistance manganites [J].

Barandiarán, JM ;

Greneche, JM ;

Hernández, T ;

Plazaola, F ;

Rojo, T .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2002, 14 (47) :12563-12573

[3] Low-temperature phase segregation in La2/3Ba1/3MnO3: Manifestation of nonequilibrium thermodynamics [J].

Beznosov, A. B. ;

Fertman, E. L. ;

Desnenko, V. A. ;

Feher, A. ;

Kajnakova, M. ;

Ritter, C. ;

Khalyavin, D. .

LOW TEMPERATURE PHYSICS, 2009, 35 (06) :449-454

[4]

Cotton F. A., 1966, ADV INORGANIC CHEM C

[5] Specific features of the structural and magnetic states of a Zn1-x Ni x Se crystal (x=0.0025) at low temperatures [J].

Dubinin, S. F. ;

Sokolov, V. I. ;

Parkhomenko, V. D. ;

Teploukhov, S. G. ;

Gruzdev, N. B. .

PHYSICS OF THE SOLID STATE, 2008, 50 (12) :2285-2288

[6]

Gutlich P, 2011, MOSSBAUER SPECTROSCOPY AND TRANSITION METAL CHEMISTRY: FUNDAMENTALS AND APPLICATIONS, P1

[7] Colossal magnetoresistance and hyperfine interactions in iron-doped La0.75Ca0.25MnO3 [J].

Hannoyer, B ;

Marest, G ;

Greneche, JM ;

Bathe, R ;

Patil, SI ;

Ogale, SB .

PHYSICAL REVIEW B, 2000, 61 (14) :9613-9620

[8] Structure and magnetic order in undoped lanthanum manganite [J].

Huang, Q ;

Santoro, A ;

Lynn, JW ;

Erwin, RW ;

Borchers, JA ;

Peng, JL ;

Greene, RL .

PHYSICAL REVIEW B, 1997, 55 (22) :14987-14999

[9] MANY-STATE RELAXATION MODEL FOR THE MOSSBAUER-SPECTRA OF SUPERPARAMAGNETS [J].

JONES, DH ;

SRIVASTAVA, KKP .

PHYSICAL REVIEW B, 1986, 34 (11) :7542-7548

[10] Transport properties and magnetic domain structure in low-doped LaCaMnO manganite single crystals [J].

Jung, G ;

Markovich, V ;

Yuzhelevski, Y ;

Indenbom, M ;

van der Beek, CJ ;

Mogilyansky, D ;

Mukovskii, YM .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2004, 272 :1800-1801

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