Details of structural and magnetic transitions in Pr0.5Ca0.5−xSrxMnO3 perovskites

Krupička, S.; Maryško, M.; Jirák, Z.; Hejtmánek, J.

doi:10.1016/s0304-8853(99)00496-5

Cited by 45 publications

(42 citation statements)

References 37 publications

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“…Nd 0.5 Ca 0.5 MnO 3 is paramagnetic semiconductor above the corresponding Ne ′ el temperature (T N ≈ 180 K) and transforms directly to the charge-ordered antiferromagnetic semiconductor phase (CE type) through a chargeordered paramagnetic semiconductor phase (T co ≈ ≈ 260 K). The critical temperature T co of the charge ordering is well above the magnetic ordering temperature T N , and the two transitions are clearly decoupled [13]. Neither of the above-mentioned compositions displays an insulator-metal transition.…”

Section: Introductionmentioning

confidence: 80%

Effect of oxygen content on magnetization and magnetoresistance properties of CMR manganites

Trukhanov

Troyanchuk

Korshunov

et al. 2001

Low Temperature Physics

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P., Sir enko V. A. , Szymc za k H., and B aer ner K.E ffe ct of oxyg en co nten t on ma gne tiza tion and magneto resista nce pr ope rties of CMR m a n g a n i tesT rukh anov S. V., Tr oyanc huk I. O., K or shuno v F . P., S i r enko V. A., Szym czak H., an d Ba ern er K .E ffec t of oxyg en con tent on mag net i z at i o n and m agn etor esistan ce pr oper ties of C MR ma nga nites The influence of oxygen content on the magnetization and electrical resistivity of Ln 0.5 A 0.5 MnO 3 (Ln = La, Pr, Nd; A = Ca, Ba ) manganites with the perovskite structure is investigated. It is shown that the La 0.5 Ca 0.

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Section: Introductionmentioning

confidence: 80%

Effect of oxygen content on magnetization and magnetoresistance properties of CMR manganites

Trukhanov

Troyanchuk

Korshunov

et al. 2001

Low Temperature Physics

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“…Similarly, this phase is not reported in other diagrams of halfdoped manganites (see, for example, the one by Rao and coworkers in ref. A much more complete characterization of the Pr 0.5 Sr 0.5-x Ca x MnO 3 system was made by Krupicka et al 19 , although they again failed to describe the ferromagnetic metallic phase at x=0.1. However, from their phase diagram, this phase cannot be discarded because these authors introduce a boundary between regions I and II of their diagram at what we refer to as t c , but they did not examine a composition at this boundary.…”

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confidence: 99%

Phase competition inL0.5A0.5MnO3perovskites

et al. 2002

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Single crystals of the systems Pr 0.5 (Ca 1-x Sr x ) 0.5 MnO 3 , (Pr 1-y Y y ) 0.5 (Ca 1-x Sr x ) 0.5 MnO 3 , and Sm 0.5 Sr 0.5 MnO 3 were grown to provide a series of samples with fixed ratio Mn(III)/Mn(IV)=1 having geometric tolerance factors that span the transition from localized to itinerant electronic behavior of the MnO 3 array. A unique ferromagnetic phase appears at the critical tolerance factor t c = 0.975 that separates charge ordering and localized-electron behavior for tt c . This ferromagnetic phase, which has to be distinguished from the ferromagnetic metallic phase stabilized at tolerance factors t>t c , separates two distinguishable Type-CE antiferromagnetic phases that are metamagnetic. Measurements of the transport properties under hydrostatic pressure were carried out on a compositions t a little below t c in order to compare the effects of chemical vs. hydrostatic pressure on the phases that compete with one another near t=t c .

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“…The ceramic materials used in the experiments were the same as those described in the work [1]. The samples contained a small volume of Mn 3 O 4 hav- [5] shows that the observed EB shift of the hysteresis loop was not practically affected by the Mn 3 O 4 impurity content.…”

Section: Methodsmentioning

confidence: 99%

“…The ceramic materials used in the experiments were the same as those described in the work [1]. The samples contained a small volume of Mn 3 O 4 hav- (143) …”

Section: Methodsmentioning

confidence: 99%

“…The manganite perovskites Pr 0.5 Ca 0.5−x Sr x MnO 3 were studied with the aim to investigate magnetic and structural phase transitions as well as the phase separation into the antiferromagnetic (AFM) and ferromagnetic (FM) regions [1,2]. The neutron diffraction, NMR and magnetometric studies were performed to determine the phase diagram of the system and the relative volumes of the magnetic phases.…”

Section: General Informationmentioning

confidence: 99%

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Magnetization Study of the AFM-FM Coexistence in the Manganite System Pr_0.5Ca_0.5-xSr_xMnO₃

Maryško

Jirák

2008

Acta Phys. Pol. A

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For the manganites Pr 0.5 Ca 0.5−x Sr x MnO 3 (x = 0; 0.3) the temperature and cooling field dependence of the reduced remanence asymmetry indicates the antiferromagnetic exchange between the antiferromagnetic and ferromagnetic spins at the surface of the clusters. For x = 0.3 we deduce the radius of the cluster in the field cooled regime to be about 20 times larger than that for x = 0. General informationThe manganite perovskites Pr 0.5 Ca 0.5−x Sr x MnO 3 were studied with the aim to investigate magnetic and structural phase transitions as well as the phase separation into the antiferromagnetic (AFM) and ferromagnetic (FM) regions [1,2]. The neutron diffraction, NMR and magnetometric studies were performed to determine the phase diagram of the system and the relative volumes of the magnetic phases. In the temperature region below about 170 K, these materials represent antiferromagnets containing a small portion (< 10 percents) of the minor ferromagnetic phase. The present contribution follows the works mentioned above and brings new results based on measurements of the exchange bias (EB) [3]. This method, which can yield information on the interface exchange interaction between the phases has been recently applied to a charge ordered manganite Pr 1/3 Ca 2/3 MnO 3 [4]. We focus our attention on the compositions x = 0 and 0.3 representing a small and medium content of the FM phase, respectively. ExperimentalThe ceramic materials used in the experiments were the same as those described in the work [1]. The samples contained a small volume of Mn 3 O 4 hav- (143)

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Details of structural and magnetic transitions in Pr0.5Ca0.5−xSrxMnO3 perovskites

Cited by 45 publications

References 37 publications

Effect of oxygen content on magnetization and magnetoresistance properties of CMR manganites

Effect of oxygen content on magnetization and magnetoresistance properties of CMR manganites

Phase competition inL0.5A0.5MnO3perovskites

Magnetization Study of the AFM-FM Coexistence in the Manganite System Pr_0.5Ca_0.5-xSr_xMnO₃

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Details of structural and magnetic transitions in Pr0.5Ca0.5−xSrxMnO3 perovskites

Cited by 45 publications

References 37 publications

Effect of oxygen content on magnetization and magnetoresistance properties of CMR manganites

Effect of oxygen content on magnetization and magnetoresistance properties of CMR manganites

Phase competition inL0.5A0.5MnO3perovskites

Magnetization Study of the AFM-FM Coexistence in the Manganite System Pr0.5Ca0.5-xSrxMnO3

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Magnetization Study of the AFM-FM Coexistence in the Manganite System Pr_0.5Ca_0.5-xSr_xMnO₃