MAGNETIC PROPERTIES OF NICKEL MANGANITE OBTAINED BY A COMPLEX POLYMERIZATION METHOD
2015
Preuzimanje 🢃
Autori
Savic, SlavicaTadic, Marin
Jaglicic, Zvonko
Mancic, Lidija
Vojisavljević, Katarina
Branković, Goran
Konferencijski prilog (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Spinel materials based on Mn and Ni has been intensively studied over the past
years due to their excellent semiconductor properties. Nickel manganite as NTC
thermistor is widely used today in different industrial sectors. Here we report the
complex polymerization method (CPM) for producing nickel manganite fine
particles with a homogeneous distribution of constituent cations in the crystal lattice that ensures formation of dense monophased ceramic with the novel magnetic
properties after been sintered in oxygen and air atmosphere. Phase composition of
the synthesized materials was examined by XRPD, while the morphology of the
powder and microstructure of ceramic were investigated using FESEM and SEM
analyses, respectively. The magnetic properties of the samples have been studied by
measuring the temperature and field dependence of magnetization.
Magnetic measurements of M(T) reveal rather complex magnetic properties and
multiple magnetic phase transitions. In the case of ai...r atmosphere we found three
magnetic phase transitions with transition temperatures at TM1=35 K, TM2=101 K
and TM3=120 K. TM1 maximum is strongly dependent on the strength of the applied
magnetic field (TM1 decreases with increasing applied field) whereas the TM3 is field
independent The values of the coercivity, remanent magnetization and saturation
magnetization at 100 K are: HC = 184 Oe, Mr = 1.92 emu/g and MS = 7.88 emu/g,
respectively. The measured values at 5 K are HC = 1035 Oe, Mr = 7.70 emu/g and
MS = 14.47 emu/g. Moreover, hysteresis properties measured after cooling of the
sample in magnetic field show exchange bias effect with an exchange bias field
|HEB=196 Oe.
For the sample synthetized in oxygen atmosphere, the magnetization
dependence of temperature M(T) and AC susceptibility data obtained from SQUID
measurements clearly demonstrates that quadruple magnetic phase transitions can be
readily detected at TM1~115 K, TM2~105 K, TM3~38 K and TM4~7 K. These findings
suggest the novel magnetic transition for nickel manganite at low temperature TM4.
The temperatures of observed maximums in χ‘(T) and χ‘‘(T) parts of susceptibility
are frequency independent, whereas the height of the peaks decreases with
increasing frequency. The fact that TM4 does not shift with the increase of the
frequency led us to the conclusion that there are no spin-glass/surface effect and/or
blocking temperature/finite size effect connected to the NiMn2O4 ceramic.
Therefore, the low-temperature peak TM4 in AC susceptibility is associated with
ferromagnetic-like and antiferromagnetic-like magnetic transition in the interfacial
FM/AFM internal structure. The exchange bias effect was found in a field cooled
hysteresis loops at 5 K. The field cooling of the sample was under a magnetic field
of 100 Oe and 10 kOe whereas the determined exchange bias fields were |HEB|=129
Oe and 182 Oe, respectively. The analysis of the results and comparison with
literature data allowed us to conjecture that the mixed oxidation states of Mn ions
and ferromagnetic and antiferromagnetic sublattice orders tailor these interesting
magnetic properties.
Ključne reči:
Nickel Manganite / NTC material / complex polymerization method / magnetic properties / SQUID measurementsIzvor:
3rd Conference of The Serbian Society for Ceramic Materials, 2015, 111-112Izdavač:
- Institute for Multidisciplinary Research, University of Belgrade
Finansiranje / projekti:
- Ministarstvo nauke, tehnološkog razvoja i inovacija Republike Srbije, institucionalno finansiranje - 200053 (Univerzitet u Beogradu, Institut za multidisciplinarna istraživanja) (RS-MESTD-inst-2020-200053)
Institucija/grupa
Institut za multidisciplinarna istraživanjaTY - CONF AU - Savic, Slavica AU - Tadic, Marin AU - Jaglicic, Zvonko AU - Mancic, Lidija AU - Vojisavljević, Katarina AU - Branković, Goran PY - 2015 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/2770 AB - Spinel materials based on Mn and Ni has been intensively studied over the past years due to their excellent semiconductor properties. Nickel manganite as NTC thermistor is widely used today in different industrial sectors. Here we report the complex polymerization method (CPM) for producing nickel manganite fine particles with a homogeneous distribution of constituent cations in the crystal lattice that ensures formation of dense monophased ceramic with the novel magnetic properties after been sintered in oxygen and air atmosphere. Phase composition of the synthesized materials was examined by XRPD, while the morphology of the powder and microstructure of ceramic were investigated using FESEM and SEM analyses, respectively. The magnetic properties of the samples have been studied by measuring the temperature and field dependence of magnetization. Magnetic measurements of M(T) reveal rather complex magnetic properties and multiple magnetic phase transitions. In the case of air atmosphere we found three magnetic phase transitions with transition temperatures at TM1=35 K, TM2=101 K and TM3=120 K. TM1 maximum is strongly dependent on the strength of the applied magnetic field (TM1 decreases with increasing applied field) whereas the TM3 is field independent The values of the coercivity, remanent magnetization and saturation magnetization at 100 K are: HC = 184 Oe, Mr = 1.92 emu/g and MS = 7.88 emu/g, respectively. The measured values at 5 K are HC = 1035 Oe, Mr = 7.70 emu/g and MS = 14.47 emu/g. Moreover, hysteresis properties measured after cooling of the sample in magnetic field show exchange bias effect with an exchange bias field |HEB=196 Oe. For the sample synthetized in oxygen atmosphere, the magnetization dependence of temperature M(T) and AC susceptibility data obtained from SQUID measurements clearly demonstrates that quadruple magnetic phase transitions can be readily detected at TM1~115 K, TM2~105 K, TM3~38 K and TM4~7 K. These findings suggest the novel magnetic transition for nickel manganite at low temperature TM4. The temperatures of observed maximums in χ‘(T) and χ‘‘(T) parts of susceptibility are frequency independent, whereas the height of the peaks decreases with increasing frequency. The fact that TM4 does not shift with the increase of the frequency led us to the conclusion that there are no spin-glass/surface effect and/or blocking temperature/finite size effect connected to the NiMn2O4 ceramic. Therefore, the low-temperature peak TM4 in AC susceptibility is associated with ferromagnetic-like and antiferromagnetic-like magnetic transition in the interfacial FM/AFM internal structure. The exchange bias effect was found in a field cooled hysteresis loops at 5 K. The field cooling of the sample was under a magnetic field of 100 Oe and 10 kOe whereas the determined exchange bias fields were |HEB|=129 Oe and 182 Oe, respectively. The analysis of the results and comparison with literature data allowed us to conjecture that the mixed oxidation states of Mn ions and ferromagnetic and antiferromagnetic sublattice orders tailor these interesting magnetic properties. PB - Institute for Multidisciplinary Research, University of Belgrade C3 - 3rd Conference of The Serbian Society for Ceramic Materials T1 - MAGNETIC PROPERTIES OF NICKEL MANGANITE OBTAINED BY A COMPLEX POLYMERIZATION METHOD EP - 112 SP - 111 UR - https://hdl.handle.net/21.15107/rcub_rimsi_2770 ER -
@conference{ author = "Savic, Slavica and Tadic, Marin and Jaglicic, Zvonko and Mancic, Lidija and Vojisavljević, Katarina and Branković, Goran", year = "2015", abstract = "Spinel materials based on Mn and Ni has been intensively studied over the past years due to their excellent semiconductor properties. Nickel manganite as NTC thermistor is widely used today in different industrial sectors. Here we report the complex polymerization method (CPM) for producing nickel manganite fine particles with a homogeneous distribution of constituent cations in the crystal lattice that ensures formation of dense monophased ceramic with the novel magnetic properties after been sintered in oxygen and air atmosphere. Phase composition of the synthesized materials was examined by XRPD, while the morphology of the powder and microstructure of ceramic were investigated using FESEM and SEM analyses, respectively. The magnetic properties of the samples have been studied by measuring the temperature and field dependence of magnetization. Magnetic measurements of M(T) reveal rather complex magnetic properties and multiple magnetic phase transitions. In the case of air atmosphere we found three magnetic phase transitions with transition temperatures at TM1=35 K, TM2=101 K and TM3=120 K. TM1 maximum is strongly dependent on the strength of the applied magnetic field (TM1 decreases with increasing applied field) whereas the TM3 is field independent The values of the coercivity, remanent magnetization and saturation magnetization at 100 K are: HC = 184 Oe, Mr = 1.92 emu/g and MS = 7.88 emu/g, respectively. The measured values at 5 K are HC = 1035 Oe, Mr = 7.70 emu/g and MS = 14.47 emu/g. Moreover, hysteresis properties measured after cooling of the sample in magnetic field show exchange bias effect with an exchange bias field |HEB=196 Oe. For the sample synthetized in oxygen atmosphere, the magnetization dependence of temperature M(T) and AC susceptibility data obtained from SQUID measurements clearly demonstrates that quadruple magnetic phase transitions can be readily detected at TM1~115 K, TM2~105 K, TM3~38 K and TM4~7 K. These findings suggest the novel magnetic transition for nickel manganite at low temperature TM4. The temperatures of observed maximums in χ‘(T) and χ‘‘(T) parts of susceptibility are frequency independent, whereas the height of the peaks decreases with increasing frequency. The fact that TM4 does not shift with the increase of the frequency led us to the conclusion that there are no spin-glass/surface effect and/or blocking temperature/finite size effect connected to the NiMn2O4 ceramic. Therefore, the low-temperature peak TM4 in AC susceptibility is associated with ferromagnetic-like and antiferromagnetic-like magnetic transition in the interfacial FM/AFM internal structure. The exchange bias effect was found in a field cooled hysteresis loops at 5 K. The field cooling of the sample was under a magnetic field of 100 Oe and 10 kOe whereas the determined exchange bias fields were |HEB|=129 Oe and 182 Oe, respectively. The analysis of the results and comparison with literature data allowed us to conjecture that the mixed oxidation states of Mn ions and ferromagnetic and antiferromagnetic sublattice orders tailor these interesting magnetic properties.", publisher = "Institute for Multidisciplinary Research, University of Belgrade", journal = "3rd Conference of The Serbian Society for Ceramic Materials", title = "MAGNETIC PROPERTIES OF NICKEL MANGANITE OBTAINED BY A COMPLEX POLYMERIZATION METHOD", pages = "112-111", url = "https://hdl.handle.net/21.15107/rcub_rimsi_2770" }
Savic, S., Tadic, M., Jaglicic, Z., Mancic, L., Vojisavljević, K.,& Branković, G.. (2015). MAGNETIC PROPERTIES OF NICKEL MANGANITE OBTAINED BY A COMPLEX POLYMERIZATION METHOD. in 3rd Conference of The Serbian Society for Ceramic Materials Institute for Multidisciplinary Research, University of Belgrade., 111-112. https://hdl.handle.net/21.15107/rcub_rimsi_2770
Savic S, Tadic M, Jaglicic Z, Mancic L, Vojisavljević K, Branković G. MAGNETIC PROPERTIES OF NICKEL MANGANITE OBTAINED BY A COMPLEX POLYMERIZATION METHOD. in 3rd Conference of The Serbian Society for Ceramic Materials. 2015;:111-112. https://hdl.handle.net/21.15107/rcub_rimsi_2770 .
Savic, Slavica, Tadic, Marin, Jaglicic, Zvonko, Mancic, Lidija, Vojisavljević, Katarina, Branković, Goran, "MAGNETIC PROPERTIES OF NICKEL MANGANITE OBTAINED BY A COMPLEX POLYMERIZATION METHOD" in 3rd Conference of The Serbian Society for Ceramic Materials (2015):111-112, https://hdl.handle.net/21.15107/rcub_rimsi_2770 .